There's only one Garfield for Genesis, so it must be that game.

I don't know if you've read the rest of this topic, but it's been stated that DreamTR doesn't have time to actually play any of these to check differences for anybody. While I understand how annoying that can be(I believe people must have at least SOME time to take out of their day if it's to double check something for a potential offer involving lots of money), if that's what he says it's probably best to respect that. That's why I'm personally only eying the things that are either unreleased or note next to them that there are differences, else it's too big a gamble considering the money involved.