Which will sell more Final Fantasy XIII (X360) or Final Fantasy Versus XIII

[XlPackratlX]

Gilgamesh said:

Which do you think will sell more, Final Fantasy XIII for the X360 or Final Fantasy Versus XIII?

I'd say Versus will win, the key is Japan which the X360 doesn't have.

Final Fantasy XIII for the Xbox 360 against Final Fantasy Versus XIII for the Playstation without including the Final Fantasy XIII for the Playstation?  What kind of arguement is this?  Is Final Fantasy XIII, the mothership title, completely out of the picture, or what?  I'm confused!