You probably just don't notice things like framerate and resolution. It's not like the game was electrocuting people through the controllers or something.
The resolution is the same, and the framerate is not some SotC-like abortion. It stays above 30fps most of the time during gameplay, the intro and car stages are the major exceptions. Not defending the port, but I don't find anything wrong in some people not noticing anything majorly wrong with it. If you don't have a 360 and you can find BayoPS3 for cheap it's fine.