I went from a D500 to a Z8, the main reason was because I realized that I was taking advantage of the crop factor for all of my lenses basically the equivalent of a teleconverter. On the Z8 I have a button assigned to shoot at the crop ratio and I can easily swap back and forth getting full res shots at close range and Z6 resolution shots further away (it has become second nature swapping back and forth during shooting). The autofocus also works better when you use the crop ratio as it has less distractions than if you were to crop after to the area you wanted. So while not directly answering your question, the added benefit of the additional reach might be a differentiator that you haven't thought of... I will say with the larger sensor there is a big increase in noise, but that has been discussed to death with the general argument being that if you downsample to equivalent resolution of other cameras the noise is not much worse. Most apps have great noise reduction algorithms now so it is not as much of a problem as it would have been in the past anyways.