Paflechien brave does nothing more than vanadium for privacy, it's the opposite: all grapheneos users have vanadium. if you were on Android you would have to use chome to be confidential and on iPhone you would have to use safari
I disagree and think what you are talking about is anonymity, not privacy, and it is only true in case you don't give identifying data away in the first place. Using the Tor Browser and good OPSEC (like not changing Browser settings beyond setup or not logging in to any online accounts) could effectively make you disappear in a mass of identically looking users, but it's nothing that Vanadium, Brave, Chrome or Safari sets out to do. Vanadium is arguably the most secure browser out there by default, but not the most private or anonymous. Brave does block some ads by default, which in some cases increases privacy compared to Vanadium. Whether Braves anti-fingerprinting measures are really effective against modern tracking methods is also arguable. Personally I prefer Vanadium and DNS ad blocking via VPN, but different setups come with different advantages...
Here's a month old post of mine that tries to explain the difference between security, privacy and anonymity:
Security to me means protecting your data/assets against unauthorized access. Privacy means controlling the (meta)data you give away (and ideally giving away as little as possible). Anonymity would be the ability to hide in a mass and not be identifiable, even if some of your data can be seen. While all three can empower/enable each other, they are mostly independent.
Edit: Added information