Usually the Sony's PS3 get's the short end of the stick when it comes to ports FallOut: New Vegas and Call of Duty: Black Ops just to name a few. But from what Bioware has in store for PS3 owners, it looks like it may buck this shameful trend.
According to IGN: The engine has been reworked to utilize the PlayStation 3's technology, so if you look closely you might notice the blacker blacks and crisper textures, but you'll probably just think it looks sharp and bright. Placing both versions side by side shows off how much better the PS3 version looks during cutscenes, but during normal gameplay it isn't leaps and bounds better than the Xbox 360.
Mass Effect 2 Video