As to OnePassword, I don’t know exactly. As to other password managers like LastPass and DashLane specifically against chrome built in...

- follow you around on encrypted cloud blob

- trusted machines you know you’ll log in from

- 2FA / MFA

- shareable passwords with friends/family

- works in all browsers

- works on mobile app / log in on any PC

- one time password access

- non-password things like door codes, software licenses, etc

- a lot more I’m just not thinking of I’m sure