I agree, but looking at Capcom's 16-Bit lineup, it is par for the course. Some games were exclusive to the Super NES and others to the Sega Genesis. SNES got things like the Mega Man X games and Mega Man Soccer while the Sega Channel got 16-Bit updates for the first three Mega Man games.
At least they were not just making straight ports between the two consoles, giving fans reason to pick up their releases on both consoles, unlike Acclaim or others. Konami did this too, giving each 16-Bit console exclusive versions of their games like Animaniacs and Contra. I miss those days.