IMO if it’s good cartridge MC has to be superior. Don’t get me wrong - it’s my opinion, it’s subjective to my hearing apparatus :)
It depends on the choice of MM/MI, i don’t use ordinary MM cartridges at all, after a years on audiogon i realized that some people never tried a good MM and don’t know about certain models. I’ve mentioned convenience earlier, this is the goal of MM (when we have many spare styli with different profiles, different cantilevers). Actually MM/MI can be very good even compared to top MC.
But anyway, i like both types (MM and MC) and it’s interesting. In my system i have two identical turntables with 2 tonearms on each turntable, so i can compare everything. FR-64fx with N60 and FR 7fz cartridge is always there in use.
I do not listen to classical music as Nandric, jazz, funk and soul from the 60s/70s is what i listen to (mostly).