Is a 6-1/2-inch or 7-1/4-inch cordless saw better?

Reviewers generally frame 6-1/2-inch saws as the lighter, more maneuverable choice for sheet goods and 2x lumber, while 7-1/4-inch saws (such as the DeWalt DCS590B and Metabo HPT 36V rear handle) add depth and power for ripping thicker stock. Carpentry-forum consensus favors a full 7-1/4 rear handle for framing, but many homeowners find a 6-1/2 covers most jobs at lower weight.