No gripes with my RAZR. I love it. I haven't checked out the Maxx, but if it's just a tiny bit thicker it's probably still thinner than 99% of the phones on the market. No battery issues for me with mine, but if the two are nearly identical in size what the heck, get more juice and get a Maxx. Personally, I'd get which ever one was cheaper.
I'm a 6' 6" guy, so I cannot comment on the girl hands thing.