Right, that is my understanding as well.  The new fit system allows each model to have 3 fits (1,2,3) instead of two (D, EE).  But the features of the different models are still different from each other.  I believe the Vapors are still asymmetrical and have the X ribs in the heel.  Obviously as the OP has identified, they also have the injected lacing system.  The Supreme boots have different features (traditional lace system, etc.).