Nostr just has a better UX but the underlying concepts are the same:

* public key crypto

* WoT for attesting public key authenticity without a centralized authority

Nostr only does the latter point partially, i.e. you implicitly "trust" your follows and sort of your 2nd degree follows but clients still don't fully exploit WoT. They could use it to curate feeds, weight or filter counters (number of reactions, followers, etc), combat spam, etc.