The closest thing to a variant is the PC version, which gave each character a mouth on their field model and revised the text. Instead of "This guy are sick," Aeris says "This guy is sick." Also, a lot of profanity is replaced with punctuation, comic style. "It's cuz Shinra keep suckin the life out with those #%#$ machines!" FF7PC also runs at 2x resolution (640x480, higher with hacks), but the videos are just stretched, making them look like crap.
I have both. My ideal version to play is the PC version with the videos converted uncompressed from the PSX disks.