Mazzer Philios vs Sculpture 64s - demonising returns?

Hi all.

It’s time for a new grinder, I’m swaying between getting a sculpture 64s (open to 78s) or spending basically double for the Mazzer Philios.

A little about my tastes - I drink mostly flat whites / americanos made with medium - dark roast coffee beans. I like the idea of playing around with some light roasts and pour over coffees but my current grinder does not do well with them.

I’d love to future proof and would ideally like to be purchasing my “end game grinder”

My main question is: is there much difference between the 3 grinders (64s. 78s. Mazzer) or past the 64s do we think it’s hitting that point of diminished returns to cost ratio?

Happy to hear other grinder suggestions as well

Thanks

Alex