Genesis wins for me on nothing other than me favoring some of these games.
Contra 3 Vs. Contra: Hard Corps - Contra: Hard Corps is a personal favorite of mine
Castlevania 4 Vs. Castlevania: Bloodlines - Bloodlines is yet again a personal favorite of mine
TMNT: Turtles in Time Vs. TMNT: Hyperstone Heist - SNES beats Genesis for me in this one. I love Turtles in Time
So for me:
SNES - 1
Genesis - 3
Genesis wins in this comparison in my eyes