Does anyone remember Tetris & Dr. Mario? This 1994 two-for-one cartridge was just that: enhanced versions of the two respective great puzzle games for the NES ported to the Super NES.

But there are some notable differences on the SNES port compared to the respective NES ports:
1. Most of the music for Tetris was from its Game Boy counterpart because the "Nutcracker Suite" song used for the "A" type music is not present. Instead we hear "Korobeiniki."
2. The rocket scene in Tetris that plays after you manage to score a huge number of points in the "B" type game is removed, as was the tune that played in it ("Carmen Overture" in the NES version; and some unknown "Hip" Tanaka tune heard in the Game Boy version)

~Ben