Why will final fantasy XIII multiplatform make people sell their PS3's?

[Onimusha12]

ssj12 said:

Shameless said:
I'm a multiplatform owner. The only reason I have a PS3 is to play this game. This game is now on 360. I sell PS3. Under. Stand?

 

which is stupid as the 360 version is a port of the PS3 version meaning that the PS3 version will be superior.

That's a bit of a stretch. Really desperate rationale even. Until we know the specific stats on each version we won't be able to coroborate such theories.