I've had both. I had the razr for three weeks, then traded it for the Gnex on release day. Just bought the Maxx off contract because the Gnex was so pitiful.
--The radios in the Maxx get 4G where the Gnex struggled to get 3G.
--Gnex Speaker and external speaker were bad and got worse, I couldnt hear the person I was trying to talk to.
--Gnex, Within 10 minutes the mic stopped on EVERY call.
--Gnex= random reboots.
--Gnex is a great phone, while tethered to a power source playing games. Its not worth a dang for making calls.
--Maxx has great signal, sound, and battery life. Only fault I can find is no voice recorder.
--The Gnex display is slightly better, but washes out in the sunlight. My Maxx doesn't.
So, if you want to play games and jump from rom to rom looking for battery life, go with the Gnex. If you want to use your phone ALL day without charging, and actually make phone calls, go Maxx.