If you have a Nostr client installed, you know what Nostr is and the Nostrich will open your default client. If you don't, tapping on it won't do anything. That's bad. The Primal logo will at least take them to a Nostr enabled website. It's messy having both, but I see the need for it until operating systems have built in support for the Nostr: application handler.
I don't love it or hate it. Someone smarter than I can solve this 😂