I've got no issues with Pentax in particular but I've always admired Hasselblads as pieces of sculpture. I'm not likely to take photographs with either, ever!
But here's a little test. See how quickly you can find Hasselblad's USA site detailing its medium format cameras and then try the same exercise trying to find the Pentax USA pages for their own medium format offerings. Maybe I'm just looking in the wrong places but if I were spending that sort of money on a camera system which very likely would have to earn its keep I know which one I'd opt for. 'Scuse me while I head off to the Hasselblad site and do a spot of drooling.
OK, I'm back and the dribble is cleaned up. Quite interesting reading the Hasselblad HC Lenses Lens Book
(PDF file). There's an introduction to MTF charts on page 4 and an explanation of why it's difficult to compare such charts when the size of the sensor differs. Then on page 5 there are a couple of direct comparisons with two Canon lenses. OK, it's a Hasselblad brochure but the results are darned impressive. 'Scuse me while I head off to the Hasselblad site and do even more drooling.