They both have their strengths and weaknesses. In particular I'd say the SNES really lags behind the Mega Drive/Genesis in multiplayer experiences. All three Streets of Rage titles are multiplayer, Final Fight 1 is not. Sonic 2 and 3 have a vs mode and player 2 can control Tails in the main game, Mario and Luigi always had to play separately and the Kongs took turns. Dashin' Desperados, Gunstar Heroes, Herzog Zwei, Bonanza Bros. Mega Bomberman was better than Super Bomberman, Micro Machines had the J-Carts for 4 player mode.
Also, at least internationally, it crushed the SNES in tactics games. Two Shining Force titles and Warsong compared to the Fire Emblem, Tactics Ogre, and Front Mission all just getting left in Japan.