How is plex.tv, their simple redirection service, pushed down your throat? You don't need to use any of that.
I have both running, but unfortunately, the Emby server just burns resources like there was no tomorrow, and you can't really compare the UX at all, hence using Plex.
That's optional. Plex has local account management. The iOS app hides it a bit, but it's there. You of course lose the plex.tv features (plex pass, etc.).
I have both running, but unfortunately, the Emby server just burns resources like there was no tomorrow, and you can't really compare the UX at all, hence using Plex.