Below I will compare the power, portability, and features of the Dewalt DCS570 and DCS391.
Difference between Dewalt DCS570 and DCS391.
Power and Blade
The Dewalt DCS570 comes with a powerful brushless motor that can generate 5200 RPM speed and maintain it under load. The Dewalt DCS391 is in a
close call, being able to reach 5150 RPM. Nothing can stop this beast. It harnesses great energy for a clean, precise cut, even when cutting through tough materials.
The 7-1/4-inch blade on the DCS570 is all about sharpness. Any DIY enthusiasts would die for this. It offers users a cut up to 2-9/16 inches deep at 90 degrees. Amazing cut on the edge of the blade and smooth control.
On the other hand, the blade of the Dewalt DCS391 only has a diameter of 6-1/2 inches. Not as amazing as the Dewalt DCS570, but it comes with carbide tips for improved durability, sharpness, and quality cuts. It’ll still cut through 2x materials at both 90 and 45 degrees.
We can see that the DCS570 takes the lead in this battle.
The Dewalt DCS570 unit has awesome maneuverability. The handle contours your hand and provides a comfortable, firm grip. The pommel – or you can call it the support handle, is offset a few degrees to relieve your wrist strain during the work.
The ergonomics also enhance the tilting degree of the DCS570, up to 57 degrees. Combined with a smaller form factor (11” x 8” x 10” vs 13” x 17.6” x 9.31” of the DCS391), you can operate the Dewalt DCS570 with no sweat at all.
Another plus point for the DCS570 is the inclusion of detents on the bevel adjustment for quick switch to commons cuts: 22.5 and 45 degrees.
The Dewalt DCS391, while not having an offset pommel, still offers a pleasing experience when held. The handle grip is over-molded with rubber, and it can bevel up to 50 degrees – not a big loss compared to the Dewalt DCS570. It is enough to cover common cuts on the construction site.
Still, it can’t be helped that the newer DCS570 overwhelms its opponent in this game.
Usually, manufacturers use mechanical blade brake, like on the Dewalt DCS391. But in the DCS570 unit, we have an electronic one! The perk of having an electric brake is a much more responsive, quicker stop, resulting in a lower chance of damaging your work or yourself.
The battery here is not quite a problem, as both use the same battery family – 20V Max Lithium-ion regardless of amp hour. The DCS391 is a bit more power-hungry than the DCS570, but not significant.
Quick Rundown Of Dewalt DCS570
- Power - Brushless motor of DEWALT 7 1/4 circular saw provides 5500rpm and maintains speed under load
- Runtime - The cordless circular saw provides 330 crosscuts in 2x4 (pine)
- Capacity - 7-1/4-inch blade of the compact circular saw provides 2-9/16-inch depth of cut
- Ease of Use - Bevel capacity up to 57 degrees
Quick Rundown Of Dewalt DCS391
- Powerful 5150 rpm motor of DEWALT circular saw delivers power and speed to make the most demanding cuts with ease
- High strength and lightweight magnesium shoe of the cordless circular saw provides job-site durability for long-term cut accuracy
- Optimized rubber overmolded comfort grip of the compact circular saw delivers optimal balance and control
- 0-50 degree bevel capacity allows for aggressive bevel cuts for a multitude of applications
- 6-1/2-inch carbide-tipped blade for cutting 2 times material at 90-degree and 45 degree and more cuts per charge
Dewalt DCS570 vs DCS391-the battle has come to an end. Overall, the DeWALT DCS570 wins the entire game. But for which is the better one, we have to look back to the users’ needs.
If your projects are mostly heavy-duty, go with the DCS570. It has more control, cutting power, and precision. If what you are looking for is durability, a long-lasting unit, and speed isn’t the main need, get the DCS 391 – Old but gold.