Originally posted by Poit As others have already said, Pentax MF fills the ultra-high resolution market slot, there isn't any point in duplicating that capability with the FF.
Sure there is, don't be so narrow-minded.
It's not like you can buy f/1.4 lenses in medium format. And the AF systems built into MF cameras are usually inferior, both due to the slow product refresh cycles as well as the physical inertia of moving large, heavy glass. And high-ISO performance usually lags as well for the same reasons.
That said, the sensor comparison is specifically a production/market issue. If you put a current-gen MF chip against a current-gen FF chip the MF is going to have better results. Not hugely, but
some better, much like APS-C vs FF. Of course your photo-budget is in serious diminishing returns territory at that point.