I found this quite confusing too.
It can be long life or it can be annual or it can be this or it can be that!?!?
My previous cars, non VW brands, just had ONE service routine. Clear and straight forward. The last car BMW was long life (2 years / 19k miles whatever came first), before that it was a Peugeot with annual services (1 year or 12k miles from memory).
I'm choosing to go with annual services on the GTI however. We usually cover about 15k per year. I guess you could that a "long mileage annual service" (long compared to someone who covers 7k miles per year)