Checked the link you posted, and do not see Clouds of Xeen diskettes listed. I would buy it if it was there.
If that's the case, apologies for my suspicions. As for the 6 pack, it contains Magic 4&5: World of Xeen, which is the combined version of both Clouds of Xeen and Dark Side of Xeen. The two games combine together and give access to some extra quests spanning both game worlds. It includes both ehte floppy version of the games, which runs by default, as well as the CD Talkie version of the games, which you have to manually run from a separate shortcut or the "Extras" area for the game GOG Galaxy.
So you'll at least have an option to play the game, though it does come with it's own installer, so you wouldn't be able to get the data for a specific original floppy from it.