Yes, they have implemented some type of AA to certain objects. In other aspects, the Ps2 version has twice number of polys/character, better lightning and a bit more of details in the backgrounds. It has new levels( 15, 5 of them for tag combat), costumes, cutscenes and 2 hidden characters.
The only bad thing about it, it\'s a bit lower screen resolution than the DC version. A good game IMO, but it can\'t compete with TTT\'s gameplay.