Super DBZ was a solid attempt at making a DBZ game that is actually competitive. It's very average as a 3D fighting game, but as a DBZ game it falls short.

The Budokai (and probably Tenkaichi) games aren't super deep or balanced or anything, but it's hella awesome to see the special moves played out on the screen in front of you. Super DBZ doesn't have all the flashy cutscenes for the super moves--in fact I don't think it has any super moves at all.

The core gameplay of Super DBZ is more in line with a 'real' fighting game than the Budokais are. If they can somehow merge the traditional fighter controls of SDBZ with Budokai's flashiness, that would be a real winner.