Oh this topic makes me wanna play MegaDrive and SNES games today! Sure SNES had its strong points like better graphics pallette (opposing to sometimes murky and depressing MD/Gen's presentation) and Mode-7 games. But on the other hand it didn't quite feature that "arcade" feeling Genesis was famous for.
Look at laughable renditions of Aladdin, Alien 3 and Outlander for SNES and compare them to MD/Gen's versions. As a result of Big N's anti-violence policy there was no games like Robocop vs Terminator, even Mortal Kombat had censored fatalities and green ooze instead on blood
Although to do some justice I appreciate some SNES games like Batman Returns, Mario Kart, FZERO, Pilotwings.