They're different stories? Are they completely different games as well?
And how do you know its better without having played either?
because they said ps3 and 360 have the full story while ps2 and wii have a shortened down version of the story. Which is cool I wanted the Wii version at point till I saw ps3 and 360 version has the multiplayer as well so I'll get ps3 version.
Out of the two versions you mentioned it's up to you which.
Wii = Shorter story , cartoony graphics (which look cool) multiplayer and motion controls
360 = No motion controls, Full story , realistic graphics and multiplayer
It's personal choice I wasn't trying to discourage either choice it's up to you.