I find that Bitwarden's UI is much less quirky, for lack of a better term. LastPass finds ways to consistently annoy me.
The commonly clicked secrets move to the top, I can see more than two items in the list, it doesn't forget me periodically, and when prompted for credentials I can't cancel it and get in anyway.
You can add multiple sites to the secret, not in some hidden menu in Bitwarden. That's handy for things like AD/LDAP credentials.
In general, one should avoid exporting/importing credentials. Instead reset them and save the new creds into the new place.
As for Bitwarden, I like the UI (iPad, Mac, iPhone) but routinely forget how to generate a new password - the function is buried inside one of the menu options. Other than that, I really like it. And, there is option to host your own vault.
&^Q@w7rC#F!%V%swarZ4@pss#
4nKR7ReAG^ghezg%yD6CF79b!
aH8MPi5NoKv4Hzdfec7Q*c4XT
hwD!LktbF5&Wxy^wh^Uq7%&%^
CYQ9%5^vXAiz&4fPp%fWfa%rq
I eventually decided that the UI was too clunky to move my whole family onto and opted for 1password. Very happy with that choice.
UI\UX is bad. I tried switching to it from 1P, but went back after four months because I'd rather pay more than suffer daily.