ActivityPub has the problem of your identity being tied to a server unlike on nostr. See this for more arguments.
I don't see that as a bad thing, necessarily. Sometimes you want centralized moderation. I have self-sovereignty on my own data by running my own Mastodon instance, but I can still use the greater network.
I do love Nostr's complete portability but to say one is better than the other, in my opinion, would be doing a disservice to the one being put down.
reply
There isnt any reason the two cannot be interoperable with stuff like mostr. In fact, for ultimate robustness, I hope we end up with a load of different protocols bridged together
reply