The DeWalt DWS779 vs DeWalt DWS780 are two of the most popular 12-inch sliding compound miter saws in the professional woodworking world. Both are powered by a strong 15-amp motor, engineered for precision, and designed with the rugged durability DeWalt is known for. At first glance, they appear nearly identical, but subtle differences set them apart. The DWS779 focuses on reliability and affordability, while the DWS780 integrates advanced accuracy features designed for top-tier professionals.
This detailed comparison highlights the differences and similarities in motor power, cutting capacity, precision systems, dust collection, portability, and overall usability so you can make the right choice for your workshop or jobsite.
Contents
Differences Between DeWalt DWS779 vs DeWalt DWS780
Below is a summary of the specifications:
Motor Power and Blade Speed
Both the DWS779 and the DWS780 are powered by a 15-amp motor running at 3,800 RPM. This ensures they deliver consistent torque for heavy-duty cutting, whether you’re handling framing lumber, hardwood flooring, or intricate crown molding.
The DWS779 puts its motor power into reliable, straightforward cutting performance. It delivers clean results with minimal deflection, even on larger boards.
The DWS780, while sharing the same motor, integrates additional technology that makes use of its power in more refined ways. Combined with its precision system, the motor provides a balance of strength and accuracy unmatched in its class.
Winner: Tie – Both saws deliver identical cutting power, ideal for tough jobsite applications.
Cutting Capacity and Range
The DWS779 offers an impressive 2 x 14 crosscut capacity at 90° and up to 2 x 10 at 45°, making it extremely versatile for wide stock. It handles 6.75-inch baseboards vertically and 7.5-inch crown molding nested, making it well-suited for trim carpentry.
The DWS780 goes further with its 2 x 16 crosscut at 90°, extending its usefulness for even larger material. It offers the same vertical and crown molding capacities but has a slight advantage with its 49° bevel tilt compared to 48° on the DWS779.
Winner: DeWalt DWS780 – The extended crosscut capacity gives it a decisive edge in large-scale woodworking.
Miter and Bevel Adjustability
The DWS779 includes a miter range of 60° right and 50° left, along with 10 detent stops for fast and accurate adjustments. Its dual-bevel tilt to 48° in both directions makes compound cuts straightforward and efficient.
The DWS780 provides nearly identical specifications but adds a 49° dual bevel tilt, giving it just a little more flexibility for angled cuts.
Winner: DeWalt DWS780 – A slight advantage in bevel range makes it the more versatile option.
Precision and Accuracy
Here lies the biggest difference between the two models.
The DWS779 relies on a stainless steel miter detent plate with 10 positive stops. While this ensures durability and accuracy for repeatable cuts, it lacks any integrated cutline guidance system.
The DWS780, on the other hand, features the XPS LED Cutline System, which casts a shadow directly where the blade will cut. This shadow system requires no calibration, unlike laser guides, and works effectively in any lighting condition. It dramatically improves accuracy for detailed trim and finish carpentry.
Winner: DeWalt DWS780 – The XPS LED system makes it the clear leader in accuracy and professional reliability.
Build Quality and Portability
The DWS779 weighs 67 lbs, making it solid and stable for heavy-duty cuts, but less portable for contractors who move frequently between jobsites.
The DWS780 weighs 56 lbs, which is surprisingly lighter despite its added technology. This weight advantage makes it more portable while still retaining professional-grade stability.
Winner: DeWalt DWS780 – Lighter and easier to move without compromising durability.
Dust Collection Performance
Both saws come with a rear dust port that can be attached to shop vacuums.
The DWS779 performs well in managing debris but can leave fine dust scattered around during extended cutting sessions.
The DWS780, due to better engineering around its dust channeling, captures slightly more debris, especially when paired with a high-performance vacuum.
Winner: DeWalt DWS780 – Superior dust collection ensures a cleaner workspace.
Ease of Use and Adjustability
The DWS779 is user-friendly, with intuitive controls, a rugged build, and smooth sliding rails. It is an excellent choice for professionals who value performance without the need for advanced features.
The DWS780 takes ease of use further with its XPS LED system, lighter weight, and extended cutting capacity. These additions make it easier and faster to achieve professional-grade results with minimal setup time.
Winner: DeWalt DWS780 – Its user-friendly enhancements make it the superior choice for professionals.
Quick Rundown Of DeWalt DWS779
Quick Rundown Of DeWalt DWS780
Conclusion
Both the DeWalt DWS779 and DeWalt DWS780 are outstanding professional sliding compound miter saws. The DWS779 is a workhorse built for durability and affordability, offering reliable performance at a lower cost. It is the perfect choice for professionals who need cutting capacity and rugged reliability without paying extra for premium features.
The DWS780, however, takes things a step further. With its XPS LED Cutline System, lighter weight, extended crosscut capacity, and improved dust collection, it is clearly engineered for professionals who demand top-tier precision and efficiency.
Overall Winner: DeWalt DWS780 – Its combination of accuracy, portability, and enhanced usability make it the superior choice for contractors, woodworkers, and craftsmen who want the very best.