Yes indeed, the PS2 version features split screen play with four AI opponents, and the DLC tracks. Also featuring is the removed engine flare (Probably for the same reason as in WipEout HD), but higher resolution textures (As seen on The Amphiseum and Platinum Rush).

Kaori is talking about those screenshots, but I don't know if they've been posted here already. So here they are:

Picture 1 | Picture 2 | Picture 3 | Picture 4