Razer Onza > Ps3/Xbox pads. (Though it must be said, for FPS games PS3 pad has garbage triggers)
I use mine on Xbox, PS3 and PC.
Xbox is better online, nobody can argue it unless your some faggotfanboy who insists. Apart from that both are similar, people say PS3 has more power but the fact is whatever platform a game is designed for it will run best on...like COD is a port to PS3, it will always run best on Xbox. Final Fantasy is a port to Xbox, it will always run best on PS3.
and so on