I didn’t go in-depth because it would have taken too much time, but I’d be interested if someone wants to make these experiments.
As for loading the main page as a logged-in user, the difference wasn’t negligible I’d say, but it was not a proper, reliable test. Just reload the page many times and take notes of the mini-profiler timer… To me, it was often between 200 and 300ms on x86 and way more often between 300 and 400ms on ARM.
Honestly, I wouldn’t advise relying on my tests, we need more robust measurements.