Is there anything new or is it just slightly better looking?
Improved graphics and all the DLC as standard.
If you've never played it then it's worth giving a go, but otherwise you have to decide for yourself if you can play the same game again.
Personally, I really enjoyed getting back in to it, even though I played it to death as a kid. The gameplay still holds up and you still get those "whoah" moments as you drift round corners at mach 2 and narrowly miss a bus.
Plus, a great soundtrack.