In my opinion, this is not that much better than the original on PSX. The DC controller is better suited for that type of game (heaven forbid we try to play Tekken on a DC controller), which makes it imminently more playable. It also has the option of turning the BBs on high bounce or low bounce. Since girls don't relaly play fighting games, I'm not really sure as to why they included this option, since everyone is clearly going to have it on high, but the gesture is well noted. As to gameplay, it differs little from the original, except in the controller, although the tag feature is a nice touch.
Summary: Get this if you have DC, and like Fighting games.
Graphics: 8 (reasonable, not the best the DC has to offer)
Sound: 8 (pretty nasty, but not Tekken bone-crunching)
Gameplay: 9 (nice tag feature)
Longevity: 6 (really didn't play this for as long as the original (although getting TTT probably didn't help)