Correct. Brave on iOS is worse than Brave on Android because Apple forces it to be a Safari skin, but they're still able to achieve some UI improvements over Safari, and achieve their built-in adblocking.
As a mobile Firefox with ublocker user I'm not sure I would call it high quality. I regularly have to force stop it to get pages to load properly. I suspect it might be the hostile google based os at fault but not sure
firefox with adblock is the high quality youtube app