DeWalt 20V MAX XR 7-1/4 in. Circular Saw Kit vs DeWalt FLEXVOLT 60V Circular Saw DCS578B

Buy the DCS590WW1 kit if you want a complete saw out of the box: it ships with an 8.0Ah XR battery, charger and 24T blade, and DeWalt rates it at up to 368 cuts per charge in 2x6 SPF. Buy the DCS578B if you already own FlexVolt batteries and want more blade speed and a lighter tool. The DCS578B spins at 5,800 RPM against 5,500, weighs 8.2 lb bare against 15.05 lb for the kit, and both cut 2-9/16 in deep at 90 degrees with a 57-degree bevel. Owners of the 20V MAX XR saw praise the power and runtime; FlexVolt owners like the speed but accept the higher battery cost and bare-tool packaging.

• Choose the DCS590WW1 if you want a ready-to-run kit with a high-capacity battery, charger and blade, and you already use 20V MAX packs.
• Choose the DCS578B if you already own FlexVolt batteries and want a lighter, faster-spinning saw without paying for another kit.