I'll be quick:
+Combat vastly improved over the original. They didnt rework the system, but they made everything far more responsive and way cooler looking combos even early on.
+Easier to do Jutsus. Now that there are easier combos for getting some god damned breathing room you can pull off a few.
+Difficulty Levels! Not only do they have difficulty levels, but if you lose a fight you can change it to easier, or for some reason, harder

+Models slightly improved. A characters mouth now moves while speaking and the art+ subtitles are no longer ruining the scene
+Real story presentation, like the original. I like the PS3 game a lot, but I really think the 360 Naruto games trump the Ps3 one in terms of adventure mode.
+World visuals improved x2
-So far, character models still could use like..chins. Other than that its been a pretty big improvement over the first (which is still a decent game- so is the PS3 one) DBZ games could learn a thing or two from the latest games for this series.
Its great to see that the combat is no longer stiff and has potential to be FUN. Pulling off Jutsus in the original (or trying to) drove me mad since enemies got up and in your face way too fast.