More noise from the z7ii at higher ISOs than I'd like to deal with. The z6ii is much cleaner and focuses better, IMHO. But the z7ii produces very clean ISO-64 images (which I am sure I'll love for landscapes - taking it to Colorado soon and New England later in fall).
As for the 70-200 f/2.8 S, I am not happy with the images produced by the z6ii for some reason - no oomph.
However, on the z7ii, that lens is a beauty. I guess the z7ii's high resolution brings out the lens' true strength.
So currently, that's what I am going with - the z6ii + FTZ on the Sigma 500mm f/4 and z7ii on the 70-200mm f/2.8 S. I also bought a 14-24mm f/2.8 S which I will get next week - I hope it also works beautifully with the z7ii.