new upgraded California 2+ is named "California 30" in the Factory's Paris Autoshow-review
As you may be aware, the Factory added an upgrade to the California-models in early 2012. Not only has the car lost 30 kg in weight but it received an additional 30 hps as well. Within the scence the "new" car was subsequently named "+30/-30" and now the Factory uses the term "California 30" in their official reports.

We will add this to the F-Register's database with the next update, knowing that the experts amongst us would not really need that as "TJ" and "TH" within the VIN tells it all...