Quote from gamespot:
The PlayStation 3 version features higher-quality textures than those on the Xbox 360, better color saturation, smoother facial animations, and shorter load times. Minor visual hiccups, like corpses that disappear and reappear, are a bit more common on the PS3, however. The PC version is the superior experience, but if you're choosing between the two console releases, the PlayStation 3 has the upper hand.
So PC>PS3>360 for this game... a very big suprise since this is Bioware's first venture on the PS3 and they're a PC developer at heart. You'd assume the 360 would be getting the better version.