I would say that the communities are about the same, although I would say that PMC's community is a little bit nicer and more put together. Both communities have been very welcoming and kind so far, I haven't had any troubles in either one, but, if I had to pick only one, I would probably go with PMC, due to the amazing profile customization options you have with the widgets and what-nots and the cleaner layout.

But to my knowledge, both sites are still great places to share your skins on! ♥