CitizenHorizon (npub1v2n…etnt) we did work looking at Scuttlebutt (ssb) and Nostr back when we switched from building planetary.social to nos.social
mplorentz (npub16zs…92l7) wrote up a comparison between the two. https://mattlorentz.com/weblog/2023/01/18/nostr-v-ssb.html