Just a personal opinion from my very little experience with nostr.

Amethyst gives a feel as if made by someone who is analytical, detail oriented, left brain dominant.

Snort is made by someone who is playful and creative, yet simplified (that's the base of nostr I guess).

satellite.earth.. left brain dominant, minimalist.

Iris feels more primitive.

Primal, Plebstr by someone who is good at imitating.