Am trying to think of another example where we have two developers making the same game but... with different engines and hardware....
For the games to be exactly the same design decisions and stuff will still need to be made with the 360 and the old engine both in mind.
Just weird.
Actually I can think of one really old school example... There was this boxing game on PS2 called... royal rumble or something. I played it at my friends house on his PS2 and liked it. I saw it a while later for PS1 (which I only had) and bought it. It was like a completely different game. I returned it the next day and learned my lesson