SNES. The games just seem smoother, the graphics sharper. The Nitenod exclusives, the Street Fighter games, most ports looked and played better than they did on the Megadrive
But I STILL don't get all the hoopla about Super Mario Kart, it looks rubbish, I've heard it uses some special graphics mode and is "3D", but I just can't see it, and the gameplay I find boring and hard to control. But then I still don't get Sonic either, so maybe its me.