Monty, SID and more
I could not come up with a better example, Drake. The problem with Impossamole is that it appeared in the wrong era. For me, 1990 isnít exactly known for its high-quality music. The Impossamole-song sounds like a Mc Hammer/Vanilla Ice potpourri and was already outdated when it was released. Also, remixing a classic song always results in an inferior tune.
Another example of a song which is great on C64 but so-so on Amiga is US Goldís Crack Down. There is only one ingame-tune in the C64 version but its much better than all songs in Amiga Crack Down. The C64 SID-chip is capable of creating really atmospheric compostions.
I remember a PD compilation called ĎThe A to Z of C64 tunesí which appeared in 1991(!) on Amiga. It featured all those lovely old C64-tunes like Arkanoid and Monty on the Run. If you search the Aminet archive you might possibly find it on ADF.