Difference between the two?

Hello everyone,

Anyone know the difference between getting an Omega watch serviced at an official Swatch service centre? Versus an Omega-certified AD service centre?

The latter has a much shorter turnaround. Where would you send your watch?

(for example, here in Canada, there is an official Swatch service centre in Toronto, which boutiques ship watches to. Otherwise, one can go to Omega certified AD watchmakers which you can find in major cities)