Not entirely sure why you need to be picky about it, it's the same game, the only difference being that Gold and Forever added some additional packages. The core gameplay doesn't change at all between the versions.

For the soundtrack (no hassle involved), intro/outro videos and the original being in three different languages.

Well GOG.com doesn't offer anything other than the Forever version, if you want another version you need to buy the game from another site. Can't see why you would considering that the original CD versions don't work at all on anything newer than XP and the Forever GOG.com edition does work on Windows 7....

I gotta say i was pretty disappointed when I saw the gog version compared to the Ps1 version I remembered playing. But then I got used to it, it's not such a big deal it's just that I miss that "Yeah!" when you beat a level and the nice twinkle the orbs made on the ps1 version.