Even though a lot of 360 exclusives were later ported to PC and other consoles, rereleases are often changed enough to alter the experience. So to me it's similar to playing a 16-bit console on a CRT vs a modern TV with widescreen hacks. You don't necessarily need to play on one or the other to enjoy them, but if you want the original experience as the game designers meant it to be, original hardware is still preferred.