I have a delightfully first world problem here, I've got both phones coming to me. Which phone would you keep, which would you give to a family member?
Keep nexus
If you got them both coming, why not play with each?
If you intend to do any modding, then the Razr with its locked boot loader shouldn't even be considered at all. No need to support Moto's shitty business practices. Rezound is unlocked directly by HTC now.
Except that the unlock leaves S on, and a ton of people are bricking their phones assuming that it's S off and installing the wrong roms.
Nexus, the only real bitches I've heard about it are that Verizon gasp, dared to put their logo on the back cover, the battery life is fairly short, the camera could be better, and that Verizon put the "My Verizon" app on it. Every review I've read calls it "The best Android phone yet"
Also, I'd suggest getting the extended battery ASAP, particularly if you intend on using the LTE.