How is resident evil 4 for ps2 compared to the gamecube version?

It's not as good graphically as the Gamecube version and has some minor FPS drops in some areas, but it has some extra content to make up for it - an extra costume, along with new weapons, and an extra game mode. The Wii and 2014 PC version are the best versions of RE4 you can play, since it has the graphics of the Gamecube and the content of the PS2, but it really doesn't matter what port you play, as long as it isn't the godawful 2007 PC port made by Ubisoft.