Up to date chromium is 100% just as bad. Forked and selectively maintained version (like brave) aren't 100% just as bad, but varying degrees well below up to maybe even slightly above this hypothetical 100% marker. Not advocating for Brave (I don't personally use it), but the way they update is my main point here.

Not all of chromium's constituent components are required for a functional browser. At the end of the day, Firefox is just easier to trust and better supported than any of the chromium forks, personal opinion.