- Edited
GeorgeSoros regarding the cameras:
8a is regarding MP slightly better, the 8 has the better sensor.
You can look at comparison of the images taken by both devices
BUT with GOS both won't be "good as" the camera with the stock Pixel-OS. It's simply not as fine tuned*
So you can have that the sensor maybe can't use the full potential and the comparisons isn't valid anymore
Lots of (extra-)processing is nowadays done by software. Hardware isn't any more the indicator for image quality like it was 10 years ago.
(*you might recall, your see in the meta-preview, the following from the FAQ/Usage:
"Camera. GrapheneOS has the same camera capabilities and quality as the stock OS. It will match the stock OS when comparing the same app on each OS." the key word is comparing the same app - not camera. )