Man of course the PS3 blows the PS2 version away because of the discrepancy in hardware capabilities. But boy, did I enjoy playing KH on the PS2. It's one of those games that anybody could get into. My female cousin who had no interest in video games even played KH 2 from beginning to end. It has a certain charisma that other games cannot match because of its inclusion of Disney characters.
Anyways, will I get the upgraded version on the PS3? Nah.