It is superior though, anyone who has used nostr and used pubky is being dishonest if they think nostr has a better UI or that nostr feels more polished. Between nostr, the fediverse, bastyon, and pubky, pubky is the only platform that feels polished and like a mainstream social media site, while having better decentralization architecture behind it. The rest (nostr included) feel kind of hacked together and while they work, you can obviously tell that they don't have the polished UI/UX of using a centralized social media site like twitter or whatever.