Nostr is the least bad of the two, but it is a victim of the Libertarian mistake: it puts "Freedom" as the highest principle, but does it only for "freedom to" and leaves "freedom from" on the curb.
Bluesky is from the very beginning looking for ways to become a middleman in the flow of information. Even if we believe that the individuals working there have more noble aspirations, as soon as their investors come knocking they will be forced to let go of their ideals.