'D' for Sega Saturn / Version Differences

I recently picked up D, a sort of a bad horror/fmv cult classic for the Saturn; I got it at a nice price ($6). I've also owned the 3DO version for a long time, but it has been a long time since I've had a working 3DO console and am curious if there are any major advantages / disadvantages across the versions of the game (it's my understanding that it was released for PSX, Saturn, 3Do and PC). So yeah, is there? It's a fun game in it's own right, but it is so goddamn SLOW, holy crap. Laura moves like she is wading through a swimming pool full of molasses. Especially frustrating is backtracking through an area you've already visited, trying to double-check for clues, at slower-than-a-snail's pace.

AFAIK, both PS1 and Saturn versions are based on the 3DO's Director's Cut version (which was released only in Japan).
The PS1 version has far superior video quality when compared to the Saturn's - aside from the usual superiority of the PS1 for video playback when compared to the Saturn, the PS1 version is 3 discs (like the 3DO's Director's Cut version) while the Saturn version has only 2 discs; so the difference is really big here.

The original 1994 3DO version, thus, has several scenes and stuff missing when compared to the other versions.

While based on the 3DO's Directors Cut version, some hardcore 3DO fans claim that the PS1 version is still inferior to the JP-only 3DO Director's Cut one, having some very few changes and said marginally inferior video quality when compared to the 3DO's.

I know shit about the PC version though.

Also, Enemy Zero for the Saturn is a must have IMO.

Thanks for the info! I should pick up the PSX version to complete my collection of the console releases. I'd like to do a side-by-side of the three, but I need to find a replacement 3DO first...