I just revisited that review for the first time in a while.... If you scroll down, at least the reviewer admits the truth about his choice for the SEGA CD version being superior:
I personally prefer Dungeon Explorer on the Sega CD, but that has more to do with my being a Sega nut than the game actually being better.
I also listened to the sample music track from the SEGA CD version. Unfortunately, it doesn't sound like the Dungeon Explorer (or II) that I'm used to.