Other than the bad word on the knob of Billy's bat; the "Mystery Card" has a different photo crop, plus a few other key details.
Rather than have me explain it, check out:
http://www.billripken.com/
Jon has a cool site that explains all the variations.
The reason I love this card is because I was in grammar school when this set came out. All of my friends were selling their souls to find this card (including me). I still remember vividly when our buddy Doug showed up one day with the real deal original FF in his hand. We all drooled over it for the whole day. He wouldn't sell to any of us, or even say where he got it. He was the king of cards for probably the entire season.
Now, years later, I have put together almost all of the known variations. How do you like them apples, Doug? I betcha don't have one of these! Heehee.
