Yeah the cool thing about Megadrive and SNES was that unlike say PS vs Xbox these days where the two are extremely similar, back then the two offered very different libraries and experiences.
SNES did have better graphics, with more colours and special effects, as well as better audio, but the Megadrive's faster CPU did give it an edge in some fast paced action games so even there while I'd crown SNES the winner, Megadrive had its own merits.
To this day, the faceoff between the two is still perhaps the most iconic "console war" ever.