I'd say that the Mamiya 7 II is more of a Nissan GTR -- quick to use, technically perfect, but lacking a soul.
My Nikon FE is like a Toyota Hi-Lux, it's perfect in it's simplicity and just will always work.
The Pentax ME is like a Miata. Crisp, quick, but a bit adolescent in some ways.
And finally, the 6x17 4x5 system....well, that's more like a Diesel Pickup with a giant camper shell on the back.