To be honest, I could never figure out the the lock/unlock settings that worked for me, no matter what I did, what time settings I hit I was always have to log back in even for the desktop app. I mean it's the same now with Proton Pass in a way, as far as when I enable a pin and close the browser, but it is so much easier entering in my 6 digit pin, and it always works. The desktop app also stays unlocked according to the Proton settings. Like I say, it was probably just me, and I did mention it on Reddit but I didn't follow up with any reply there that may have been posted.
Side by side with the desktop app open, I'm not sure how much of a difference cosmetically or functionally there is (besides some of the website icons Proton is missing) . I didn't give Bitwarden enough of a chance though, maybe for about a week?