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.