Quote Originally Posted by Shaggy
What does the collapsing of the 6 gain? appx 1/2-3/4"?
You could go with the Mamiya 7 & mask the film aperture to 6X6 if you really like the square. Then you have the availability of the new camera & lenses.
Regards[/QUOTE]

No, much, much more than that. It make a complete difference in the carryability of the camera. My Mamiya 6 fits in the a tiny carrybag. Look at the comparison photo in the middle of this review page:
Mamiya 6 Review

T.