(re: QfG4 – Collection version vs. standalone)
It may be simplest to check the version #s. You probably don’t even have to run the game to check them. There’s probably a file called “version” in the root of both CDs. If they’re the same, then you have no worries. If they are different – well, I’m not sure that anyone here could tell you what the differences are in terms of the bugs. But I strongly suspect they are the same.