I find PC vastly superiour, but my PC is also built specifically for up to date gaming. Compared to what my PC can do, the PS3 graphics are bleh, controls are clunky, and my reaction times are artificially slowed down. In short, PC > PS3 if you have a good PC. (You can use a controller and the controller-based interface on the PC as well, so that's not a factor.)
I do have to say though, for Gathering, PS3 is very pleasant... lounging on my couch while farming shards is pretty cool, and graphics or quick reactions don't matter. (Crafting is okay, too, but can get annoying if you want to buy or sell in between).