Age old discussion I know but MM or MC? Benefits?

Leonard the Cooper, funny kind of name : )... but he´s simply right.
Welcome to A´gon

The essence of a HQ cartridge: low moving mass of stylus/cantilever ass´y. I have known it for thirty years already.

Best regards,

Well, i have Joseph Grado Signature XTZ (MI) cartridge, but i can’t say that MM cartridges like the Grace Level II (or F-14 LC-OFC), AT-ML180 OCC, Pioneer PC-1000mk2, Stanton CS100 WOS are on the lower level, they are even better than MI. Life is not so simple!

Don’t forget the superb Moving Flux cartridges like the Glanz MF61

Chakster, you got it all wrong. I never said the MM´s you just mentioned are inferior to MI´s mentioned by Leonard. On the contrary, they are as good some even better. This all comes down to TA´s and decks used, really. Audio life is hardly ever simple but audiophiles are using different equipment to evaluate quality/quantity differences in their carts, TA´s, preamps etc. The quality of one´s preamp and deck in particular is essential, not to mention a TA he´s using for a certain cart in question.
You are both right, in fact. Leonard´s experience tells an other side of the truth we are seeking for here.

And yes, the GLANZ MFG 610LX is a superb performer, in my system.

@harold-not-the-barrel but my post was addressed not to your statement, but to @schubert 's "MM all the way" 

P.S. I'm still not sure the MFG 610LX is equal to earlier MF61 which i have never seen for sale in many years. 

Answer noted. Don´t worry about the MFG 610LX. I think it was only for the European market thirty years ago but it´s superb nevertheless.