1Password pros:
* very polished UI, pleasure to use
* good UX in general
1Password cons:
* I have constant issues with it loosing connection with browser. Extension just randomly stops working for few days. Tried to fix it multiple times, never succeeded
* Price (too expensive for my private use)
Bitwarden pros:
* Free
* Very simple app, easy to use
* More reliable than 1Password for me
* Fills login pages quicker than 1Password
* Feels quicker and more snappy than 1Password
Bitwarden cons:
* Lacks 1Password polish, generally UX and UI needs some work
* Can't login using fingerprint on Mac
* Crashes on my iPad when trying to save new credentials (need to report it as a bug, but I didn't go around to it yet)
* Slow on Android
All in all, I'm very satisfied with Bitwarden and use it daily.