The main reason to choose the DeWalt DWS780 over the DWS779 is its factory-integrated XPS crosscut positioning system. Both belong to the 12-inch, corded, double-bevel sliding compound miter-saw category. A higher model number alone does not tell you whether the extra cost will improve your work.
For a new purchase, start with the DWS780 if you want integrated cut-line guidance. Consider a DWS779 offer only after checking the package, condition, seller support and total price: DeWalt’s US miter-saw catalog lists the DWS779 as discontinued. Remaining listings do not necessarily mean current production.
Our pick between these two: DWS780 for integrated XPS
Choose the DWS780 when you regularly position cuts to individual pencil marks and want the factory XPS system included. Compare the actual current offer before buying; a stand, suitable finish blade and work support can change your complete setup cost.
Already own a working DWS779? The model difference alone is not a reason to replace it. Decide whether cut-line visibility is a recurring limitation in your projects.
| Model | Tool format | Buying reason | Check listing |
|---|---|---|---|
| DeWalt DWS780 | 12-inch corded, double-bevel sliding compound | Factory-integrated XPS positioning | View DWS780 on Amazon |
| DeWalt DWS779 | 12-inch corded, double-bevel sliding compound | Conditional value if factory XPS is unnecessary; listed as discontinued by DeWalt | Check DWS779 offers on Amazon |
What the specifications actually establish
DeWalt describes the DWS779 with a 15-amp motor and a 3,800-RPM rating. Its DWS780 description also identifies a 15-amp motor and adds integrated XPS positioning. These specifications establish the general tool class and the feature distinction; they do not prove identical performance under every load.
Both are sliding, double-bevel compound miter saws using 12-inch blades. Sliding travel helps accommodate wider stock, while double bevel allows the head to tilt in either direction for suitable cuts. Those capabilities still have limits at different miter and bevel combinations.
Use the exact US model manual’s capacity chart for your material and orientation. A headline board size is not a guarantee that an equally wide or tall piece fits at every compound angle. Check fence position, clamp clearance and the permitted cutting arrangement.
Why XPS matters during layout
XPS provides a blade-shadow cut-line indication rather than a separate laser line. That is the DWS780’s clearest buying distinction in this comparison. It helps show where the blade will meet a mark, but it does not choose the correct waste side for you.
Think about your workflow. When every trim piece has a different measured length, a visible blade reference can be convenient. When you repeatedly cut the same length against a properly arranged stop, the extra benefit may be smaller. This is a task-based reason to pay for the feature, rather than assuming the more expensive option is automatically necessary.
Cut-line guidance does not replace calibration, workholding or checking a test joint. If two pieces fail to meet, investigate the angle setting and setup instead of assuming the shadow line establishes every aspect of accuracy.
When a DWS779 offer can still be worth considering
The DWS779 is the alternative for a buyer who does not need factory XPS and finds a sufficiently attractive complete offer. Treat discontinued-model status as a reason to examine the transaction more carefully, not as proof that every existing unit is unusable.
Confirm whether the listing is new, used or renewed, who sells it, what is included and how returns work. Ask about warranty eligibility where necessary. A low headline price can become less compelling if the package lacks the accessories you expected or the support arrangements are unclear.
Do not buy on the assumption that any light kit will fit. Model type and revision can matter for accessories and parts. Verify an approved installation with DeWalt for your exact unit before including a conversion in your budget.
Compare the cost of a usable workstation
Write down the delivered saw price and the additional items your projects require. Include the stand or bench mounting, long-stock supports, suitable blade, clamps and dust-collection connections. Compare equivalent packages rather than a bare saw against a bundle.
Avoid treating an old online price as today’s expected deal. This guide deliberately leaves out fixed dollar figures and stock claims; the linked offers are where you should check the present seller, condition and package.
If the difference between two complete setups is modest, factory XPS may be the simpler choice for frequent layout work. If the difference is substantial, decide whether that feature would solve a real repeated problem. Keep room in the budget for proper support and a blade suited to the material.
Check space and handling before ordering either
A sliding miter saw needs operating clearance as well as a place to sit. Measure the movement behind the saw, the dust-hose route and the room needed to handle stock on both sides. A shipping-box measurement is not the working footprint.
For a permanent station, plan support surfaces around the saw’s table height and the stock lengths you use. For a portable arrangement, check the stand’s mounting compatibility and how you will load and move the complete kit. Do not assume that two similar product photos establish the same handling experience.
For occasional small trim projects, compare other saw sizes and formats too. A large sliding saw is useful only if its capacity and space requirements suit the work you actually do.
Older-unit recall check: model and date code matter
DeWalt’s US recall covers certain DWS779, DWS780 and DHS790 miter saws. Its recall information identifies date codes 2019 04 through 2022 04; these codes refer to production identification, not simply the date someone bought the saw.
Before using or buying an older unit, check its identification and repair status against the complete official notice. If affected, stop using it and follow DeWalt’s remedy instructions. A listing photograph or a seller’s description is not a substitute for checking the actual saw.
Use the official recall page linked below for the identification illustrations, exclusions and repair process. The notice concerns particular units; it should not be reduced to a blanket statement that every saw bearing either model number is affected.
Should a DWS779 owner upgrade?
Keep the current saw if it meets your cutting needs, is in sound condition and any applicable recall has been resolved. First identify what slows you down: seeing the cut, supporting stock, obtaining a clean edge or setting repeatable angles. Those are different problems.
An upgrade for factory XPS is most persuasive when lining up individual marks is a frequent part of your work. Replacing the saw solely to improve an unsupported board or compensate for a poorly matched blade may leave the original problem unresolved.
If you need a different capacity, portability or power source, broaden the comparison beyond these two models. Choose the replacement around that requirement rather than paying for a feature that does not address it.
Questions readers ask
Does the DWS779 have a factory XPS system?
XPS is the integrated feature highlighted on the DWS780. Do not assume a DWS779 listing includes it or that an unspecified retrofit kit fits your exact model type.
Is the DWS780 automatically more accurate?
Its cut-line indication can make positioning convenient, but cut accuracy also depends on calibration, blade suitability, workholding and technique. This comparison does not claim a measured accuracy advantage from hands-on tests.
Is the DWS779 discontinued?
DeWalt’s US miter-saw catalog lists it as discontinued at this October 2026 refresh. That is distinct from whether a retailer still has an offer. Check the actual condition and seller arrangements.
Does the recall apply to every DWS779 and DWS780?
No. Check the model, production identification and repair status against the official notice. Follow DeWalt’s instructions for affected units.
Choose the feature and the complete offer
The DWS780 is our preference between these two for a new buyer who wants factory XPS. The DWS779 remains a conditional value comparison for suitable remaining or used offers. Verify the exact package, support and recall status before deciding.
Sources and editorial approach
This guide was refreshed in October 2026 using primary sources and original practical analysis. It does not claim hands-on equipment tests. The exact tool and accessory instructions govern their operation.
DeWalt: DWS779 product overview
DeWalt: DWS780 product overview and XPS