pjd:
Carrara:

 Let me lay it out for all of you making it very simple. Here is what you can have on the rear from factory.

  • PORSCHE - 911 Carrera
  • PORSCHE - 911
  • PORSCHE

That's it, nothing else comes from factory besides those three things.

 

 

Carrara, i think is missing (for the base model) the: PORSCHE Carrera Smiley

 You can see it from 0:10

 

 Wow, I sounded kind of cocky in my post, I didn't mean to sound like that at all.

pjd: No production ready cars or in any of the configurators show that as an option, so I think that the cars we're seeing with badging like that are just prototypes.