It's strange when you think about it, because Cloud really is Cloud due to Aerith's death, so his character is less defined in KH (not just because he all he is a nice sparring-buddy). I managed to catch some spoilers (and I won't spoil unless you'd like me to) and played the Jap version, but he's pretty much similar to his KH cameo.

Perhaps his AC character has been carried over, but I have to say (because it is disjointed from the original FF game/movie) that for someone younger than Leon, he sure is more macho. O_o