Stewart I just did some further reading and found this older thread that you might be interested in.
https://discuss.grapheneos.org/d/4242-brave-vs-vanadium
Brave tackles fingerprinting with its built-in features, while Vanadium's approach is to simply blend in with all other Vanadium users.
I do appreciate Brave's better site-data isolation, though, so I might stick with Brave as my main browser for that reason alone.
I'm all open to everyone's arguments, of course. I'm no expert, so some enlightening would be appreciated.
For someone who still logs into Instagram on their browser (and acknowledges that it's generally a no-no here), what would be the most private option (even if only by a little bit)?