It’s a cool NIP that I need to read more about.
Basically what I tested was 100% local using Nostr browser extensions to sign an event using a server auth challenge. It’s more similar to NIP-42 however doesn’t need to be a relay, and doesn’t need websockets. It just uses a similar event payload over REST.
So I’d say fewer devices, less network dependent, more transitional sessions using cookies, etc. A simpler approach, but also less features.