So that you point out 2 “angles.” Is the dungeon skinned a couple of means or is that actually the background the gamers method it from and what expertise and assets can be found to them from the beginning?
I will begin with a caveat: I am not Monte, in fact—all of the deep secrets and techniques of this product exist in his head or the manuscript on his laptop. And I am within the fantasy playtest, so I have not seen it from the opposite angle. So do not maintain me 100% to this! However this is what I can say with some confidence:
It isn’t two variations of the dungeon–it’s the identical dungeon both means. The planet it is on has a uncommon mineral (referred to as inveigh) that defies gravity. So when an interstellar civilization found this planet, they despatched a survey group to analyze this materials, and that group created a hidden base on the floating island that is the key supply of inveigh–but they hid the bottom deep underground to reduce contact with the medieval-like cultures on the planet.
What they did not know is that this planet has different distinctive properties–particularly magic, supernatural creatures, and stuff like that. Now they’ve misplaced contact with the bottom (presumably as a result of the magic and their tech would not get alongside).
So, should you’re enjoying a fantasy recreation, that is your private home world and also you’re exploring the large dungeons on this floating isle and discovering bizarre stuff that is the results of these guests’ base. And also you’re doing it with swords and spells. In the event you’re enjoying a sci-fi recreation, you are attempting to regain a misplaced base on this big underground labyrinth, and dealing with numerous inexplicable stuff (and creatures). You are doing it with blasters and sensor packs. However both means, it is the identical surroundings.
I’ve in all probability gotten a couple of particulars incorrect right here and there, however that needs to be a reasonably correct gist of it. Hope it is sensible!

