Not different versions but rather the same game.
Lets see.... My cousin gave me his copy of ff7. I then lost it, but since I had not finished it and wanted to so bad, I bought another copy of the game.
I stored it and all my other discs on a CD cary case which fell out of the car at some point... I have no Idea how this happened.
So then I bought the PC version cause it was $15 and well... why not... Well it was sitting on my bed and my brother jumped on it beaking the disc.... lame.
Then I bought another copy at a used game store. And it worked just fine but I think It was missing the case or manuel or something like that. Since I like my games to be in good condition I bought another from Blockbuster a few years back..
so I have had 5 ff7 games..