I say that they are different maps because of the backgrounds. However, I think that from looking at your photos that The Ubermutant and Death Knight are on different maps that might or might not be from The Nocturnal Missions.
PFG 9000, the Jaguar version doesn’t have The Nocturnal Missions bosses. I think I had forgotten to mention that the Jaguar version seems to have a different gun, a flamethrower, and a Doom-style missile launcher that’s not in the PC version unless you mod the PC version with editors. To everybody, I appreciate the responses!