This is a good question. Despite owning Kanzenban and the original versions, I still have yet to pinpoint all the differences. They're perfect ports in terms of engine feel and everything. Kanzenban includes a sound gallery and image gallery with unlockable images, as well as some bottom screen support through displaying some of these images and, IIRC, also displaying a map during gameplay. This might just be with Shun though, I can't recall at the moment. The thing that gets me is that information on the game online always says Kanzenban has a new field/s, but even after scouring some Japanese sites I can't quite figure out what they are, or if they even exist. I've checked maps, reviews, etc. and none of them are specific. I don't think I found any new stages through my playing of it, either. I'd really appreciate some elucidation on this as well.