You're joking right? It's like night and day. It's CDDA digital CD quality studio mixed music.
Dont forget that the Xenon II music (and the subtitle Megablast) was taken from a mainstream music album by "Bomb the Base" called "Enter the Dragon", specifically a track called "Megablast. It was not created specially for this game.
The CDTV version contains 3 new special remixes of the Megablast track which are somewhat b@stardised from the original but still better than the David Whittaker Amiga MOD.