Isn't it hard to do an accurate comparison with ME2 at this point? Yes the game is finally available to play on PS3's - but only in demo form. Wouldn't we get a more accurate comparison once the game launches next month?
Regardless, I'm happy with what I've played. It runs smooth, looks great, and feels real good with the Dualshock. First day for me!
Edit: What ever happened to the comparison video on IGN? Normally I wouldn't trust a thing coming from IGN - considering they like to kiss M$ ass - but you cannot deny that the PS3 version was far superior..

Proud owner of the PSone original, PSone slim, PS2 slim, PS3 slim, PSP-3000.
37 PS3 games and counting.