Introduction
If you’re shopping for a miter saw and stuck between the DEWALT 779 vs 780, you’re not alone. These two 12-inch sliding compound miter saws look almost identical, but there’s one key difference that’ll cost you about $100 more.
I’ve spent weeks researching both models, reading hundreds of user reviews, and comparing specs to help you make the right choice. Let’s cut through the marketing fluff and figure out which saw belongs in your workshop.
Table of Contents
Quick Answer: What’s the Difference Between DEWALT 779 and 780?
Here’s the deal: The DWS780 has a built-in LED work light (XPS Cross Cut Positioning System), while the DWS779 doesn’t. That’s literally the main difference.
Both saws share:
- 15-amp motor
- 12-inch blade capacity
- Same cutting capacity (16 inches crosscut at 90 degrees)
- Dual bevel capability (0-48 degrees left and right)
- Stainless steel miter detent plate
- Same weight (56 pounds)
So you’re essentially paying extra for that XPS light system on the 780. Is it worth it? Let’s dig deeper.
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Understanding the DEWALT DWS779
The DEWALT DWS779 is what I call the “no-nonsense workhorse.” It’s a professional-grade 12-inch double bevel sliding compound miter saw without the fancy light system.
What You Get with the 779?
This saw comes ready to work right out of the box. The 15-amp motor delivers 3,800 RPM, which is plenty of power for cutting through hardwoods, trim, framing lumber, and even composite materials.
The dewalt 779 vs 780 comparison always starts with cutting capacity, and both are identical here. You get 16 inches of crosscut capacity at 90 degrees, 12 inches at 45 degrees, and a vertical capacity of 6-3/4 inches at 90 degrees against the fence.
The dual bevel feature is a back-saver. You can tilt the blade both left and right without flipping your workpiece. The bevel angles go from 0 to 48 degrees in both directions, with positive stops at common angles like 0, 22.5, 33.9, and 45 degrees.
Build Quality and Durability
DEWALT didn’t cut corners on the 779. The stainless steel miter detent plate has 10 positive stops at the most common angles. The tall sliding fences support crown molding up to 7-1/2 inches nested and base molding up to 6-3/4 inches vertically.
The cam-lock miter handle delivers quick and accurate miter angles. There’s virtually no play in the system when locked down, which means cleaner cuts and less frustration.
Breaking Down the DEWALT DWS780
Now let’s talk about the DEWALT DWS780. This is the premium model with the XPS Cross Cut Positioning System.
The XPS System Explained
Instead of a laser that burns out and needs replacement, the XPS system uses LED lights to cast a shadow of the blade onto your workpiece. This shows you exactly where the blade will cut without any calibration needed.
Here’s why some pros love it: the shadow adjusts automatically as the blade wears down. With traditional lasers, you need to recalibrate as your blade gets dull or when you change blades. The XPS eliminates that hassle.
The system uses two LED bulbs positioned on either side of the blade. They’re bright enough to see in most lighting conditions, though direct sunlight can wash them out a bit.
Same Power, Same Performance
Everything else about the 780 matches the 779. Same motor, same cutting capacity, same dual bevel system, same weight. You’re literally getting the identical saw with an added light system.
The dewalt 779 vs 780 debate often centers on whether that light system justifies the price jump. For some woodworkers, absolutely. For others, it’s an unnecessary expense.
Head-to-Head Comparison: DEWALT 779 vs 780
| Features | DWS-779 | DWS-780 |
|---|---|---|
| Price Range | $399-$449 | $499-$599 |
| XPS Cut Line System | ❌ No | ✅ Yes |
| Motor Power | 15-Amp | 15-Amp |
| Blade Speed | 3,800 RPM | 3,800 RPM |
| Blade Size | 12-inch | 12-inch |
| Crosscut Capacity (90°) | 16 inches | 16 inches |
| Crosscut Capacity (45°) | 12 inches | 12 inches |
| Vertical Capacity | 6-3/4 inches | 6-3/4 inches |
| Bevel Range | 0-48° (Both Sides) | 0-48° (Both Sides) |
| Miter Range | 0-60° (Left/Right) | 0-60° (Left/Right) |
| Weight | 56 lbs | 56 lbs |
| Dust Collection | Standard Port | Standard Port |
| LED Work Light | ❌ No | ✅ Yes (XPS) |
| Warranty | 3-Year Limited | 3-Year Limited |
| Best For | DIYers, Budget-Conscious Buyers | Professional Contractors, Daily Users |
Let me break down how these saws compare across the features that actually matter.
1. Cutting Accuracy
Both saws deliver excellent accuracy right out of the box. You might need minor adjustments to get perfect 90-degree cuts, but that’s true of almost any miter saw.
The 780’s XPS system gives you a visual reference that some users find helpful, especially for compound angles or when cutting expensive materials where mistakes are costly.
However, the 779 is just as accurate once you make your marks. I’ve talked to finish carpenters who’ve used the 779 for years without ever wishing for that cut line indicator.
2. Ease of Use
The XPS system on the 780 does speed up your workflow if you’re making lots of repetitive cuts. You can see exactly where the blade will hit without squinting at pencil marks.
But here’s the thing: professional woodworkers develop a feel for their tools. After a few days with the 779, you’ll know exactly where your blade cuts without needing a light to show you.
Both saws have the same controls, adjustment knobs, and bevel/miter mechanisms. Learning curve is identical.
3. Dust Collection
Let’s be honest: miter saw dust collection generally isn’t great, and both the dewalt 779 vs 780 models are just okay in this department.
You’ll capture maybe 60-70% of the dust with a shop vacuum connected to the dust port. The rest ends up on your work surface and floor. That’s pretty standard for sliding miter saws.
Pro tip: connect a good shop vac and add a dust collection bag for better results with either model.
4. Portability
At 56 pounds each, neither saw is what I’d call lightweight. They’re designed for job sites and workshops, not for carrying around all day.
Both have handles molded into the base for transport. You’ll want a good miter saw stand with wheels if you’re moving these regularly.
The XPS System: Is It Worth the Extra Money?
This is the million-dollar question in the dewalt 779 vs 780 comparison.
When the XPS Makes Sense?
You should consider the 780 if:
You’re a professional contractor who makes hundreds of cuts daily. The time savings add up.
You work in low-light conditions like basements or early morning/late evening. The XPS lights up your cut line clearly.
You cut expensive materials like exotic hardwoods where mistakes are costly. The visual confirmation gives extra confidence.
You have vision issues that make it hard to see pencil marks or need reading glasses. The bright cut line is easier to see.
You frequently switch between different types of cuts and want quick visual confirmation without double-checking measurements.
When the 779 Is the Better Buy?
Stick with the 779 if:
You’re a weekend warrior or DIYer who uses the saw occasionally. The cost savings (usually $100-150) can buy you blades or other tools.
You work outdoors in bright sunlight where the XPS system is harder to see anyway.
You’re comfortable marking your cuts and don’t need the visual guide.
You’re on a tight budget and need to maximize value.
You already own a quality measuring and marking system that you trust.
Real User Experiences
I’ve read through hundreds of reviews for both models. Here’s what actual owners say about the dewalt 779 vs 780.
What DWS779 Owners Love?
Users consistently praise the 779 for being accurate, powerful, and reliable. Many finish carpenters and framers say they’ve used theirs for years without issues.
One contractor told me: “I’ve cut thousands of pieces of crown molding with my 779. Never once wished I had the light. Just mark it and cut it.”
DIY users appreciate the professional quality at a lower price point. Several reviewers mentioned using their 779 for home renovations and being thrilled with the results.
What DWS780 Owners Love?
The 780 owners rave about the XPS system, especially those who work in low-light conditions or cut dark materials where pencil marks are hard to see.
One cabinet maker said: “The shadow line is dead-on accurate. I can work faster and more confidently knowing exactly where my blade will hit.”
Several reviewers mentioned that the XPS has held up well over years of use, though a few noted the LED bulbs eventually need replacement (they’re not expensive).
Common Complaints for Both
Both saws share the same complaints:
- Dust collection could be better
- The included blade is mediocre (most users upgrade immediately)
- The height can be awkward on some work surfaces
- They’re heavy for frequent transport
These aren’t dealbreakers, just things to be aware of.
Pricing and Value Analysis
As of November 2025, here’s the typical pricing landscape:
The DWS779 usually runs around $399-$449, though you can find sales that drop it to $350.
The DWS780 typically costs $499-$599, occasionally dropping to $450 on major sale days.
That’s a $100-150 difference for the XPS light system. Is it worth it?
Breaking Down the Value
If you make $30/hour as a contractor and the XPS system saves you just 30 seconds per cut, it pays for itself after roughly 200-300 cuts. For busy pros, that’s maybe a month of work.
For DIYers, the math is different. If you use the saw once a month for projects, that savings might never materialize. The 779 delivers the same cutting performance for less money.
Where to Buy
Both saws are widely available at:
- Home Depot
- Lowe’s
- Amazon
- Acme Tools
- Direct from DEWALT
Check all sources before buying. Prices fluctuate, and you might catch one during a sale. Black Friday and Prime Day often have solid deals on both models.
Blade Options and Upgrades
Here’s something most dewalt 779 vs 780 comparisons miss: the included blade on both saws is just okay.
Both come with a 12-inch 32-tooth blade that’s fine for general construction but not ideal for finish work.
Recommended Blade Upgrades
For finish work and trim: Get a 60-80 tooth carbide blade. Brands like Freud Diablo, DeWalt’s premium line, or Forrest make excellent options.
For framing and rough cuts: A 40-tooth combination blade handles everything well.
For cutting composite materials: Look for specialized blades designed for vinyl, PVC, or composite decking.
Budget $30-80 for a quality blade upgrade. This makes a bigger difference in cut quality than choosing between the 779 and 780.
Maintenance and Long-Term Ownership
Both the dewalt 779 vs 780 models are built to last with proper care.
Routine Maintenance
Keep the sliding rails clean and lightly lubricated. Dust and sawdust buildup causes the slide to stick.
Check blade alignment every few months, especially if you’re making critical cuts. Both saws can drift slightly over time.
The bevel mechanism should be cleaned periodically to maintain smooth adjustment.
XPS Maintenance on the 780
The LED bulbs in the XPS system typically last for years, but they will eventually need replacement. DEWALT sells replacement bulb kits for around $20-30.
Some users report one bulb failing while the other keeps working. The system still functions but casts a less visible shadow with only one light.
Replacement is straightforward—just unscrew the old bulb assembly and install the new one.
Common Repairs
Both saws share the same potential issues:
- Motor brushes may need replacement after heavy use (years down the road)
- The miter lock handle can work loose (easy tightening fix)
- Dust buildup can affect smooth operation (regular cleaning prevents this)
DEWALT’s customer service is generally solid, and parts are readily available.
Who Should Buy the DWS779?
The DEWALT DWS779 is perfect for:
Budget-conscious buyers who want professional quality without paying for features they won’t use.
Experienced woodworkers who prefer traditional marking methods and don’t need visual cut guides.
DIY enthusiasts tackling home renovation projects where the saw will see moderate use.
Shop owners who want to maximize their tool budget and allocate savings toward other equipment.
Anyone who works primarily outdoors where the XPS system’s visibility is limited anyway.
Who Should Buy the DWS780?
The DEWALT DWS780 makes sense for:
Professional contractors making hundreds of cuts daily where time efficiency matters.
Cabinet makers and finish carpenters who need precise, confident cuts on expensive materials.
Workers in low-light environments like basements, garages, or early morning job sites.
Anyone with vision challenges who benefits from the bright, easy-to-see cut line indicator.
Woodworkers who value convenience features and don’t mind paying for enhanced workflow.
My Final Recommendation
After comparing every aspect of the dewalt 779 vs 780, here’s my honest take:
Buy the DWS779 if you’re a homeowner, DIYer, or occasional user. You’ll save $100-150 that you can put toward better blades, a good stand, or other tools. The cutting performance is identical to the 780, and you’ll get professional results without paying for a feature you might not need.
Buy the DWS780 if you’re a professional contractor or cut daily. The XPS system genuinely speeds up workflow and reduces mistakes when you’re making hundreds of cuts. The time savings justify the cost, and the visual confirmation is valuable when working with expensive materials.
For most people reading this, the 779 is the smarter choice. It delivers the same power, accuracy, and durability as the 780 at a lower price point. Professional contractors who value time efficiency and work in varied lighting conditions will appreciate what the 780’s XPS system brings to the table.
Final Thoughts
Both the DEWALT 779 and 780 are excellent miter saws that’ll serve you well for years. You really can’t go wrong with either choice—it’s just about deciding whether the XPS cut line indicator is worth the extra investment for your specific situation.
Remember, the saw is only part of the equation. Invest in quality blades, learn proper technique, and maintain your tool regularly. Those factors matter more than choosing between these two models.
Whichever you choose, you’re getting a powerful, accurate, dual-bevel sliding compound miter saw from one of the most respected power tool brands in the business.
FAQs
Can I add the XPS system to a DWS779 later?
No, DEWALT doesn’t sell the XPS as an aftermarket upgrade. The 780 is designed from the factory with the XPS system integrated.
Do both saws use the same blades?
Yes, both use standard 12-inch miter saw blades with a 1-inch arbor. Any blade that fits one will fit the other.
Which saw is better for crown molding?
Both handle crown molding identically. They have the same fence height and cutting capacity. The 780’s XPS might help with visibility on dark stain-grade molding.
How accurate are these saws out of the box?
Both are very accurate but may need minor adjustment for perfect 90-degree and 45-degree cuts. This is standard and takes just a few minutes.
Is the XPS system durable?
Most users report years of reliable service. The LED bulbs eventually need replacement but are inexpensive and easy to change.
Can I use these saws for cutting metal?
Not recommended. These are designed for wood, composites, and similar materials. Use a metal-cutting saw with appropriate blades for metal.
Which saw holds its value better for resale?
The 780 typically maintains a slightly higher resale value due to the XPS feature, but both DEWALT miter saws hold value well.
