All Models A7V or A7R V for airshows?

[Gripenfury]

I am planning to switch to the Sony system soon.
What I will use the camera for is travel, some night photography and quite alot of airshow photography. I have looked on basically all different options and narrowed it down to the A7V or A7RV.
For airshows I will use the Sony 200-600mm.

The question is if the A7V will be enough for me resolution wise, I understand it is faster than the A7RV but I am used to shoot with mechanical shutter on a Nikon APS-C dSLR so the FPS limit is ok with me but not optimal of course.

What Pros and Cons I have found.
Pros of the A7V:
Partially stacked sensor
Newest AI AF
Smaller file sizes due to resolution

Cons of the A7V:
33 mp, not that much cropping ability ( I previously had Nikon D7200 with Sigma 150-600 S = 900mm equivalent, and then cropped a little bit more on airshow photos in post)

Pros of the A7RV:
61 mp, lots of crop ability to get same result as 900mm without too much loss of resolution.

Cons ot the A7RV:
Large file sizes will eat memory quick
Slower readout and buffer
Slower AF?

I am really stuck with the decision on what to go with.

Is the A7RV quick enough for airshow photography? Does anybody have the experience of both cameras, airshow photography or going from Aps-C to FF and losing the crop factor when using 600mm?

I have looked at other bodies already and dismissed them so no need to introduce other alternatives

Thank you for your help!

 

[Richard A]

I have an A7RV. I think there is very little in difference in focusing between the two models. I don't know much about the A7V. The A7RV has a huge buffer. I have only shot commercial flights and some larger military planes at the local airport but when following tiny birds flying around between bushes etc. I have never managed to fill the buffer.

 

[rcreamer]

Fwiw, I wish I had even more EVF pixels on my a7r5 for manual focusing. Here's this spec for both cameras:

The Sony a7V has a 3.68 million-dot EVF, and the Sony a7R V has a 9.44 million-dot EVF.

 

[Peter K]

Since you want to do night photography too, the A7RV has more pixels, but (as a consequence) more noise at low light. Check sample images at dpreview.com to see if the amount of noise is acceptable for you.