Conifer I love Brave and use them both. Brave doesn't get the attention Vivaldi does but it's severely under-rated browser. It's a tight sharp ship. I'd say AS security conscious at FF--maybe more. It gets a bad rap because people parrot each other on it's bitcoin bent and ad replacement options but once you disable/decline that stuff it never pesters you again and reverts to a highly stable and unsung browser.
They all have their strengths & weakness but I abandoned a single browser maybe 7 months ago to simultaneously use 2-3 browsers to their full strengths so I get the best of all worlds depending on tasks.
Not sure I'd go back to a single browser again while computing.