There are trade-offs of course. I have both MM and MC and go back and forth all the time. If your really want to know the truth, though, both are easily eclipsed by MI. Try to listen to either a SoundSmith or a Grado or if you can find one a NOS Bang & Olufson and the truth will be revealed.
Any truth to my feeling that MM carts are possibly better than MC on rock recordings?
I have an Ortofon Red on a Project Debut Carbon and a EAT C Sharp with an MC Ortofon Quintet Black. I have two systems and I've switched the tables between the systems and tried a few different scenarios and I hear a little more punch with the Ortofon Red. I know all things aren't equal here but I'm trying to explain this somehow. One system is Dynaudio Evidence Temptations with JC 1 Monos and JC 2BP Pre. PS Audio Stellar phono or a little Project MM phono. The other system is PrimaLuna 400 Evo Integrated with same phono stages and Salk Sound 3 speakers. The Project and Ortofon Red sound great to my ears. More punch and solidity of sound.