You cant forget Earthworm Jim now! MUCH nicer on the SNES
Doom (even when the Megadrive had that 32X!),
FIFA (even tho I hate it!)
Mortal Kombat (megadrive was faster, and blood- but seriously, more buttons + superior graphics and sound)
Another 2 to compare, probably unfairly, but I guess it demonstrates the differences in graphics--- Shadowrun... they are different games on each console, but the differences show through easily.
PCE... I'd say would have been better if it was more commercial as in more games, people owning them, and was better than the snes + md in speeds and graphics for a while, but did the effects keep up with the snes with all these cartridge chips?