Ninja Gaiden Sigma PS3 vs. XBox/360 comparison

We've actually scored an HD comparison of the PS3 title Ninja Gaiden Sigma with the original Ninja Gaiden on the XBox (in both 480i on the original XBox and the not-very-different simulated 720p on the 360). Obvious graphical advances aside, it's fairly obvious that the two games are completely, completely different as far as gaming experience goes. Sure, the moves may be familiar, the territory and enemy AI may not be that much different (how much further can one go than "really frickin' hard"?), but the experience of playing the game will be a world of different.