DeWALT DCS570P1 20V MAX 7-1/4 in. Brushless XR Circular Saw Kit 5Ah, New Senco Power Input:

Power Input:

Burner Type: Jenny Twin Fire Modular Gun Burner

So it comes down to personal preference when choosing between the two tools

The POWERSTATE™ brushless motor provides cutting power  that has only been associated with corded tools

(1) 9" X 3/32" X 7/8" Metal Cut-Off Wheel (49-94-9000)

DeWALT DCS570P1 20V MAX 7-1/4 in. Brushless XR Circular Saw Kit 5Ah, New Senco Power Input:This Circular Saw gives you with the power and depth of cut of a corded circular saw, but with the portability and convenience of cordless. DEWALT brushless motor technology delivers excellent performance and runtime when cross cutting 2x material and ripping sheet goods. Includes (1) 7 1 4" (184mm) Circular Saw (1) 7 1 4" (184mm) Blade (1) Blade Changing Wrench (1) 20V Lithium Ion Battery (1) 12V MAX* 20V MAX* Lithium Ion Battery Charger (1) Rafter