With Bluesky you can prove that you haven't been censored (yet), but silencing someone is trivial if you can prevent them from accessing their own chain.

Whereas with nostr you can't prove that you have a complete message history, but knowing a BIP39 nsec, having access to something capable of computing a signature, and finding literally any way at all of transmitting data to the outside world, you can post to the network.

To me this is a far more valuable form of censorship resistance.

Any opinion on these features which doesn't mention CAP (Consistency, Availability, and Partitionability) is almost certainly misguided. Availability and Partitionability are vital to censorship resistance. Consistency is not.