I'm not being harsh, you just haven't presented anything beyond empty words.
The panopticlick test (now renamed to coveryourtracks) is not a study, but a test you can actually do yourself with different browsers: https://coveryourtracks.eff.org/
Also, I presented an article from zdnet (backed by a study), about the phoning home of the different browsers: https://www.zdnet.com/article/brave-deemed-most-private-brow...
And at this point I don't think it is worth it for me to invest more time arguing anymore, since you seemingly did not read my comments. There are plenty of other comments addressing all the "issues" you were talking about.
I find the claim that Firefox is less privacy focused than Brave a bit questionable. Brave certainly seems to have good and probably better defaults in that regard, but remember that Firefox is basically developed in collaboration with the Tor project and as a result has various significant (mainly non-default) privacy features architected in such as first party isolation, containers, and Tor-project-approved fingerprint resistance. Easily-disabled telemetry seems like a small hassle compared to such concrete privacy features which do not exist elsewhere.
And for example with something like first party isolation, it is unclear whether Brave would even want or be able to to maintain such a patch set on top of Chromium when it requires quite deep integration with the browser engine.
There’s also the manifest v3 stuff which will presumably end up in Brave at some point.
[1] https://2019.www.torproject.org/projects/torbrowser/design/#...
I will indeed test both browsers, if Brave is objectively better obviously I want to use it... However, I wish there was just stats on both browsers we could see side by side.
I did find this, https://www.mozilla.org/en-US/firefox/browsers/compare/brave...
Obviously biased because it's from Mozilla, however- I think this argument is moot. They're both better than what else is out there.