Over the past few weeks I've been using both, Brave is a little more polished and the built in blockers are great.

However, they've been caught a couple of times doing naughty things:

https://decrypt.co/31522/crypto-brave-browser-redirect

Combine that with a CEO who had a my way or die reputation for not admitting something's wrong and you've got a browser I removed from my system. Trust is huge and makes me wonder what else is happening in the background nobody has caught.

Vivaldi's got all kinds of tweaks exposed you'd need to dig into flags for. I like that. I think my biggest gripe is dragging and dropping links out doesn't work. Pretty small potatoes.

Daily driver is still Firefox + uMatrix + uBlock Origin and hoping for Mozilla email + calendaring at some point soon (take my money!).