RandByte Cromite (fork of Bromite, itself an android version of Chromium) is very close to Vanadium but not that hardened.
Cromite adds a lot of attack surface with the built-in adblocker, which is also implemented in a unsafe language; this, along with other issues makes Cromite much weaker than something like Vanadium or even Chrome security-wise.
RandByte It features all patches from UngoogledChrome (which is a must in the desktop world IMHO)
It's best not to claim something is "a must" if you don't know enough about the subject.
RandByte I'd be interested in some serious sources for that claim. The patches in UngoogledChrome do not impair security and certainly not privacy.
Maybe you should first provide sources supporting your claims.
RandByte The component updater is for privacy reasons and was stated on the page at the time I read it. If you want to use UngoogledChromium, your are responsible to update it yourself.
The component updater is not responsible for updating the browser, but rather parts of it which require rapid continuous updates to ensure security. With out of date CRLSets (the example given in the blogpost a different user linked), you could connect to a website using a revoked certificate (likely controlled by an attacker) without any indication from the browser.
RandByte The concerns about bad packaging from the distros is valid and I really don't know if they still apply but I personally don't care since I use the binary build which follows the good practices.
The binary builds for ungoogled-chromium are provided by random users, even their own GitHub page warns against using them (this also means you can't guarantee they follow good practices).
RandByte The last paragraph is... well a joke! If only setting a few flags in Chrome (not Chromium and even less so UngoogledChromium) were enough to be private, that would be a first! Chrome is riddled with phone home and spy capacities to exfiltrate as much as possible data from their user base. That's the sole purpose of this software, it's the core business of Google, that's why they put so much effort on it.
So basically, you can consider UngoogledChrome as a highly secure and very privacy focused browser. There's no current information that could contradict that fact.
Again you make big claims even though your posts show you are far from an expert on this subject.