I'd have said registered name includes titles, no?
As far as them being different, well, Jet's reg name (w/o titles) is Jerlin's Saint or Sinner. The breeder had been calling him "Saint". I said "Linda, I can't call a basenji Saint". She replied "Well, his name is Saint or Sinner, so you could call him Sinner." I, in mock horror, told her "I'm not about to call a basenji Sinner!" So, I wanted to call him Jude since St Jude is the patron saint of Lost Causes (and therefor the patron saint of people who do agility with basenjis), but hubby nixed it. And since it was his dog . . .
Digital, is Idlewild-Jerlin's Digital. That's his name without titles, with titles adds about 2 lines to his name.
The name Zest! came before the dog. The name came to me and I knew it would be a great agility basenji name, but she was Makalika Jerlin Cherry Pop on her paperwork.
All of my dogs were registered before I got them.