Uhh, no, gonna have to disagree with you here. It entirely depends on what sort of racers you like. SNES did top-down racers quite well and had a handful of fun gems like Battle Cross. However, Genesis was basically spearheading the whole racing genre in the arcades. Outrunners, Super Monaco GP, and Super Hang On were a lot of fun.
I can't really swallow taking bad arcade ports over awesome system exclusives. The Genesis Outrunners is just so bad compared to the arcade version. It's not like it's just the usual downgrade. It just is straight up wrong. It's like, you can't take away scaling from a sprite scaler. That's what they are.
The SNES doesn't even have an answer for a lot of stuff on Genesis, either. What compares to Streets of Rage?
As shitty as the SNES Final Fight is, I'd take it over SOR1. SOR2 is propped up entirely by the music. The music in Final Fight 2 and 3 is just awful, but honestly, in terms of the games themselves, they're just as good as SOR2. FF3 with good music would be better than SOR2. And that's kind of my point: even in the areas where the SNES is weaker, it's still not BAD. It's like, yeah, it might not have a beat 'em up that's quite as good as SOR2, but Final Fight 3 isn't BAD. It doesn't have a run n' gun as good as Gunstar Heroes, but Contra 3 is still really good whereas the Genesis has nothing similar that's even halfway as good as Super Metroid.
What about all the random Toaplan games like Hellfire, Fire Shark, Truxton, and Zero Wing that aren't on SNES? What about all the random Technosoft games like Thunderforce 4, Herzog Zwei, Devil's Crush, and Elemental Master not on the SNES? What about all the random awesome EA games like Mutant League Football, Mutant League Hockey, NHL 94, etc? I mean, we can pick random companies back and forth. It's no secret that each system had its strengths and weaknesses.
I know we can, and when you do, you really find that the SNES just had better games. A lot of the games in your list are middling at best. Sorry, but Zero Wing, Fire Shark, and Hellfire simply aren't that special. The Genesis has, like you said, a lot of mid tier games, but the SNES is just overflowing with really good games. I'd take Actraiser, Demon's Crest, Pilotwings, Starfox, Megaman X, Super Punchout, Super Ghouls N' Ghosts, etc. over all the random decent games on the Genesis. The SNES library really is stronger when you look at the big picture. It has actual exclusives. Not just crappy arcade ports and middling games.
Genesis is really strong in shmups, arcade conversions, platformers, sports games, beat 'em ups, and top-down shooters.
The SNES was stronger on arcade ports. The color palette limitation on the Genesis was just the kiss of death for arcade ports. You lost too much. The SNES Smash TV blows away the Genesis version, too.