When I was a kid I didn't like Bully on the PS2, according to my big brother.
Last year a friend of mine talked about it, so I tried it on my PC and finished it.
I really enjoyed it and don't even know why I didn't like it on the PS2, so I decided to try it on PCSX2, and again, I finished it, and I like it way better then the SE edition.
1)Ps2 version is much darker than the SE edition, which is too bright.
2)In the Ps2 version missions are harder, for example I failed Russell in the hole 2 times but in SE I finished it at the first try or at the gym classes where you have to press Triangle/R to steal the dodgeball from your opponents, where you have to press R a few times on SE but Triangle a lot of times on the Ps2.
3)Sound echo in large places such as the gym.