Not to make things more complicated, but for UV-mapping, the latest version of UV Master in ZBrush is quite efficient now, and probably faster than both. However, if you’re not using ZBrush, please disregard. :o
Per the vs Maya debate, I’d recommend staying with if price isn’t an issue. Maya does have the Epic Character Rig Creator plug-in, which is a big plus for rigging/skinning/animation, but I find modeling easier in . In a perfect world, both!
Cheers,
-D