Which is better for framing?

The DCS578B. Its 2-9/16 in. depth cuts 2x lumber at 90° with room to spare, and 5,800 rpm keeps up in thick stock. The DCS565B tops out at 2-1/8 in.

Which is better for trim and plywood?

The DCS565B. At 6.3 lbs it is easier to control on sheet goods and trim, and it costs less. Its 2-1/8 in. depth covers 1x and most plywood cuts.

Do I need a different battery for each?

Yes. The DCS565B uses 20V MAX batteries. The DCS578B needs FlexVolt 20V/60V batteries to get 60V power. Neither saw includes a battery or charger.

Is the DCS578B worth the extra money?

Only if you cut thick lumber often and own FlexVolt batteries. Otherwise the $63 gap plus battery cost is hard to justify for light work.

Both use brushless motors and electric brakes, so motor life is similar. The DCS578B works harder on thick stock, while the DCS565B is stressed less in trim work.

Can the DCS565B cut 2x4s?

Yes, at 90°. Its 2-1/8 in. depth clears a 1-1/2 in. 2x4. At 45° it cuts only 1-5/8 in., so beveled cuts in 2x stock need the DCS578B.

DeWalt DCS565B 20V MAX 6-1/2-in. Brushless Cordless Circular Saw vs DeWalt DCS578B 60V Max 7-1/4" Circ Saw Bare

Buy the DCS565B if you want a light, cheap 6-1/2 in. saw for trim, plywood and quick cuts. Buy the DCS578B if you cut thick framing lumber or need corded-saw power and already own FlexVolt batteries. The DCS565B is $122.00 at eBay as of November 4, 2026, and the DCS578B is $184.99 at Walmart as of November 4, 2026. The DCS578B costs about $63 more, and neither includes a battery or charger.

Today the DeWalt DCS565B 20V MAX 6-1/2-in. Brushless Cordless Circular Saw costs $62.99 less at its best price.

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