Will the Carrera have one or two turbo's? If one on the Carrera than the problem is solved, the Turbo has two turbo's, so Carrera will be called Carrera and the Turbo be called Turbo.
The regular 911 was never called the Carrera naturally aspirated . There was a Carrera and a Carrera 4 etc etc . They will be called exactly the same thing , 911 Carreras and a 911 turbo .