Hey, I didn't even think to do the obvious.... Take a look at this scan:
http://www.rfgeneration.c...40/bf/U-040-S-03670-A.jpgThat's the box I have. It's been in the database for who knows how long. Anyway, if you look at the bottom center of his box, there's not a big honky Genesis logo there. A little to the right there is a smaller logo partially covered by the sticker.... but it may be curved enough to be a Mega Drive logo. Of course, it could just be a box variant and it could still be for Genesis. Guess it doesn't much matter, except that it would be nice to know if a Mega Drive version does indeed exist or not.
More scans here:
MonopolyEDIT: I looked again at that auction, and nevermind. It just looks like a box variant. I should probably check to see if mine is a hard case. I bet that's all it was.