The Google Play Moto G is XT1032 (the global gsm model). As I understand, you can easily convert the normal one from motorola (either global or US gsm) to a play edition rom if you want to. See the Mototool thread in the original development section of this forum for details on how to do so. As for custom roms, both versions (xt1034, xt1032, and xt1032 GPE) are fully supported by all roms as far as I can tell (please, I would be happy if someone would correct me if I'm wrong about that). I'm personally happy with my 16GB US version running stock kit kat with xposed framework and a number of modules.