I agree. I own both Hassy kit and Mamiya 6 kit and the Mamiya 6 lens are sharper than Hasselblad. However, some may call them sterile or cold or clinical whatever, that’s all subjective.
I’ve used most MF systems and I’ve never seen lenses sharper than the Mamiya 6 and 7 lenses. Some Rolleiflexs I’ve had do come close as well as some Hassy lenses.
Love the 50, but I have to admit, coming from 35mm I find square framing in 28mm equivalent FoV to be quite challenging! I'm getting better though. The IQ is stellar, no doubt. No external finder necessary.
I have a Mamiya 6 for sale in the classifieds if your curiosity gets the better of you