I'm not entirely sure I'm getting what you're trying to say, especially because you refer to "Continental PremiumContact" in general.
As far as I know, there are at least two versions of the PremiumContact: the numbered ones ("5", "6", etc.) and then there's the "C". I can buy both the numbered ones and the "C" versions in Europe.
Are you saying that the "PremiumContact C" version we have access to here in Europe is different than the "PremiumContact C" version that comes installed in the car?
Genuinely just trying to understand, that's all.