Sonic and Knuckles Sandopolis
While Michael Jackson's music is all over most of Sonic 3's music, he had nothing to do with the second part of Sonic 3 (AKA S&K). That's probably the reason the music for S&K sounds different and doesn't have that R&B/New Jack Swing sound. S&K and S3 were meant to be one game but had to be split into two games.
One of the few songs I liked on S&K was this one Sandopolis. Here's the best part; Sandopolis Act 2 is a completely different version of the theme. It is much slower and creepier, probably because there are actually ghosts in the later acts of this stage. Act 2 sounds so different that I wouldn't call it a remix like the other stages.
Again, I liked the music in S3 better, but I really like these songs.