When I was film based I had a Mamiya 645 system. It suited the various different photographic situations at gigs I would do. It is lightweight and the lenses are superb. Women photographers liked the Mamiya because of its size and weight. I then started with Hasselblad stuff and I do like it better.

I do like the shutter in each lens on the Hasselblad versus the focal plane shutter in the Mamiya. Perhaps that's a reason why Mamiya lenses are less expensive. I also like the square format better than the 645 format. I've never had any trouble with either system.

Both are very good and capable systems. I would try each of them out and see which you like. You may like the way one feels, the controls, the backs & accessories on one better than the other.