It's interesting that one dealer I spoke with a couple of weeks ago said I could go nearly to the head of the line on a GT3 (delivery in Dec) because several people had switched to the RS. He was mystified as was I. Only thing we could figure was the potential that it would be a little more "exclusive". Maybe they were hoping the RS would not have a sunroof
But then agian maybe it will be exclusive 15 - 20 years from now - Biff to girl friend at the Pebbel Beach Concours d'Elegance 2026, "Hey check out that GT3RS, that was the year Porsche went insane and made a GT3RS with a sunroof...man, don't see too many of those around."