Jack Flesher wrote:
I’m now debating my next Sony body. I do mostly landscape, including night-astro and travel. The sports I shoot are my grandchildren.
Jack, I am in your shoes. Very similar usage pattern, and I've been very happy with the A7RV for all of these use cases. But then one day I got hit by GAS and ordered the A1 II. This "upgrade" did absolutely nothing for me: my AF hit rate has been more or less the same. I guess kids/dogs running around aren't serious enough action to show off the superior sensor speed of the A1 II, and I never needed more than 5-10fps. Couldn't care less about an electronic shutter.
HOWEVER... handling two different bodies was annouing as hell. Despite being mostly identical, there was too much friction shooting with both at the same time:
1. Muscle memory. I kept trying to press the non-existing Fn button on the A7RV
2. Impossible to quickly sync all settings across cameras (camsets), so they would diverge over time in random places.
3. Post-processing was annoying because of different color profiles. Can't just copy-paste adjustments on a series of photos.
4. In your case, you'll have two incompatible batteries too.
So I went back to a single body, and if I add a second one again, it will be exact same model.
TLDR: get another A7R6
P.S. BTW I have the Nikon ZF as well, and weirdly I found shooting with two completely different bodies to be less confusing for my brain. Somehow, the moment my fingers feel the drastically different shape of the ZF, it activates different parts of my muscle memory and there's no confusion at all. But the post-processing pain is still there, so I never shoot them together. One for lightweight travel, another for "serious" work.