TLDR on "Nostr Connect" - NIP46 vs. NIP7?
Discussion
Admin & target keys vs your private key stored in a browser extension that sign events.
With nip-46 you can create as many target keys as you want and use them for separate tasks / clients. You can fine tune access to target keys - assign certain rights, expiry date and such. Much more flexible.
Plus nip-47 does not work with PWAs.
More here: https://lnshort.it/nsecbunker