Ryouga's voice comes the closest to sounding like the show. This is probably due to the controls. Combos are very simple too, as there's no complicated movements to master. Another difference in the controls are the special moves. And for the most part you use the same button combinations for each character.
Some characters also have moves done by pressing two buttons at once.
Overrall, this is one of the better fighting games in existence, albeit a little different from the show. I recommend this game heavily, though see the anime first, otherwise you might get confused. Get some tapes of the anime, watch them for an hour, get the game, and when you become a full-fledged addict, import the games.