The music that you would hear is exactly the same as in SMW. No difference at all whatsoever. And it's always the stage theme that takes place outside. They even play it in castles and caves, which sucks, and at some points, they add the Yoshi beat to it, even though Yoshi is no where to be found. It'd be at least better than that if they had worked on it a little bit. But definitely wouldn't hit the Mario potential.