When checking out double-bevel miter saws, two top candidates that crossed my mind are the DeWalt DWS779 12-Inch Sliding Compound Miter Saw and the DeWalt DWS780 12-Inch Double-Bevel Sliding Compound Miter Saw. While both of them look similar due to their 12-inch blades, they have distinct differences as well.
If you don’t know which of the two to buy, don’t worry – I’ve listed all their similarities and differences below to help you out.
A Quick Look at the Two DeWalt Miter Saws
Both of these models are double-bevel miter saws, so you don’t have to flip the material you’re working on, unlike with single-bevel miter saws. Since they have a 12-inch blade, they are ideal for larger projects, such as for dimensional lumber.
Before we dive into the similarities and differences between the products – and their resulting advantages and disadvantages – let’s start with a brief review of each.
This 12-inch miter saw has a 15-amp motor with a 3,800-RPM no-load speed. For dimensional lumber, it can cut up to 2×10 at 45 degrees and 2×14 at 90 degrees. Both bevel capacities for left and right are 48 degrees while its vertical cutting thickness is up to 6-3/4 inches. The saw weighs 56 pounds, which is a typical weight among similar miter saws.
Its dust extraction can capture up to 75% of material debris while it has a stainless steel miter detent plate that not only strengthens its durability, but displays easy to read measurements. It has machine-base fence support and an oversized bevel scale that will increase the accuracy of cuts.
Other features of this sliding compound miter saw include the linear ball bearings and the clamping mechanism that help stabilize the vertical holding capability for the material. The blade is made of carbide material to withstand intensive job site use. The DeWalt DWS779 works best for cutting dimensional lumber with sizes of 2×14 or 2×12.
The cam-lock miter handle has a detent override so booking your favorite setting is possible to make repetitive cuts. The tool has two arbor sizes: 5/8-inch and 1-inch for compatibility. It is backed by a 3-year limited warranty.
For a more detailed look, read my review of the DWS779.
Similar to the DeWalt DWS779, the DeWalt DWS780 has a 15-amp motor that runs up to 3,800 RPM. The tool has a weight of 56 pounds and is equipped with a 12-inch blade. With a total of 10 positive stops for its miter detent plate, it has a miter capacity of 60 degrees to the right and 50 degrees to the left.
For dimensional lumber, you can cut up to 2×14 at 45 degrees and 2×16 with a back fence, same with its crosscut capability at 90 degrees. As for its maximum width and height for a 45-degree miter, it can cut up to 4×8 pieces.
Like the previous pick, it also has a dual arbor size of either 5/8-inch or 1-inch and it has a vertical capacity of 6-3/4 inches as well. However, its crown molding capabilities were mentioned: 13-3/4 inches horizontally and 7-1/2 inches vertically.
Its miter detent plate is also made of stainless steel while backed by dual horizon steel rails. Moreover, it also has machine base fence support, a good dust extraction system, and linear ball bearings.
What makes it unique is the XPS crosscut positioning system, in which a shadow is projected using an LED light, which will become the cutting guide for the material. A similar 3-year warranty is given to the tool by the manufacturer.
For a more detailed look, read my review of the DWS780.
DeWalt DWS779 vs. DWS780: Similarities
So what makes these two miter saws from DeWalt similar to each other? Let’s have a look at some features they share:
Motor and Cutting Speed
Usually, 12-inch miter saws don’t have the same kind of speed as the 10-inch models, because they are bigger. Typically, a 10-inch blade can run for more than 4,000 RPM, while 12-inch blades will run much slower. With that in mind, a 3,800-RPM speed is considered sufficient for most tough woodworking jobs such as dimensional lumber.
Cutting speed is important in a miter saw (and any power tool used for cutting, for that matter). Even if you have the sharpest blade and the biggest cutting depth, you won’t get a lot of productivity from running a saw that has a slow speed, unless you are handling a material that is highly delicate and requires slower or variable speeds (e.g. stainless steel or glass). Anyway, both these miter saws are only mainly used for woodworking, so that’s out of the question.
As both of the DWS779 and the DWS780 are 12-inch saws, they are more likely to have similar miter detents as well. Both have a set of 10 positive stops, which will allow you to work fast without sacrificing accuracy.
Positive stops are points that the manufacturer already pre-measured for you so you don’t have to constantly measure the specific angle that you want. Having a bunch of positive stops on your miter detent will make it easier to work on your material and save you a lot of time in the long run.
If you are looking for a time-saving feature on a miter saw, a good set of positive stops is one of them. There are even more expensive brands that have up to 13 positive stops, but 10 is still more than enough for typical woodworking projects.
Vertical Cutting Depth
When it comes to the vertical cutting depth, both the DWS779 and the DWS780 have a capacity of 6-3/4 inches. The usual norm with 12-inch miter saws is 6-1/2 inches and the biggest is around 7-1/2 inches (which is rare, anyway) so the 6-3/4-inch capacity is more than enough.
Miters saws that have a bigger blade will also have a larger cutting depth, so it’s best to go for such tools if you want to save time when working on larger pieces of wood or softer materials. Not to mention, when it comes to cross cutting capacity at 90 degrees, both of them can cut up to 2 x 14 inches of dimensional lumber (up to 16 inches with a back fence setup).
While it is already hinted at in the beginning, it’s worth mentioning once more that both the DWS779 and the DWS780 have a 12-inch blade as compared to other miter saws that are 10 inches or smaller.
So, what can you do with a 12-inch miter saw versus smaller ones? Well, for starters, it can cut larger pieces of wood in less time than a 10-inch saw. If you are handling pinewood for your next project (or any similar wood that’s not ideal for a smaller saw), a 12-inch miter saw would do the job better because of its size and power.
Furniture makers are also recommended to use 12-inch saws instead of the typical 10-inch ones because of the size of the materials they are typically working on. The bottom line, if you work on large plywood and lumber, go for this saw blade size instead.
DeWalt DWS779 vs. DWS780: Differences
While there are a plethora of similarities between the two DeWalt miter saws, they do have some features that are unique to each other, such as the following:
XPS Crosscut System
What makes the DeWalt DWS780 mainly different from its predecessor, the DeWalt DWS779, is the XPS cross-cut system. It is not exactly a laser that directly illuminates the workpiece – it is more of a shadow projection feature in which the casted shadow from the LED light hits the material instead. Then, you will use that line to make your cut – plain and simple.
Having this convenient system will speed up your work with little to no errors thanks to its effortless measurement. Many woodworkers need accuracy but with deadlines ahead of them, they might have to sacrifice it due to time constraints. Therefore, having a miter saw that cares about the accuracy of your cut without being a hassle to set up is important.
Another advantage that the DeWalt DWS780 has over the DeWalt DWS779 is the top handle design. This handle is not just for holding the tool in place when you’re working – it is mainly also for transporting it from point A to point B without tiring your hands from an awkward position.
Having a convenient handle not only makes the tool easier to move but it also puts you away from accidentally bumping up the miter and bevel settings. No woodworker wants their next cutting task to be inaccurate, so if you’ve already set the parameters to your desired values, it would be a waste if you accidentally misaligned just because you were holding the tool in the wrong way.
While the DeWalt DWS779 has a bevel capacity of 48 degrees, the DeWalt DWS780 differs just slightly at 49 degrees. Even though both of them have similar positive stops, just a slight improvement with the bevel capacity can be a game-changer for professional workers.
With that in mind, both these two miter saws have a good bevel capacity. Some miter saws even have smaller bevel angle values at only 47 degrees or less.
Which of the Two DeWalt Miter Saws Should You Get?
If you ask me, I think that the DeWalt DWS780 is a much better choice if you prefer to have a cutting guide, thanks to its XPS crosscut system. Not only does it make your cuts more accurate but it will also save you a lot of time and effort when working against a deadline. Not to mention, it has a portable top handle that will make operation and moving the tool easier. Although the bevel capacity does differ between the two, it is a small difference.
However, that doesn’t mean that the DeWalt DWS779 doesn’t deliver – it’s still a great miter saw to consider if you’re not so much into the XPS crosscut system and just want to get the job done in your shop. It has enough cutting capacity for larger pieces of lumber which makes it at par with the DeWalt DWS780 for bigger jobs.
In the long run, you choose which of the two DeWalt miter saws you want to get for your next project, for the job site, or your woodworking shop. Both of them have a solid build, great enough cutting capacity and power, and are user-friendly when it comes to their convenient features.