See my Pentax wishlist.
Images are shown at native sizes for both cameras, as well as at enlargements of 72 and 311 megapixels, along with crops shown from the 311MP size. Why show an enlargement of 311 megapixels? Because its width of 21600 pixels corresponds to 300 dpi with a 6-foot-wide print (1.83 meters wide). And because crops from that resolution are easy to view and see differences.
Includes images at up to native resolution as well as 72 and 311 megapixel upsampled images (with and without pixel shift), as well as crops from the upsampled images.
There is good news for both Nikon D850 (and Nikon Z7) owners here and equally good new for Pentax K-1 Mark II owners. What a pity that Nikon does not extend the quality envelope with pixel shift on the Nikon Z7.