Revana Wine question....

So I know Dr. Revana has his Estate Cab line… then branched out into Pinot Noir and now Gewurztraminer.

I have some confusion I’m hoping somebody can clear up. What’s the intention with his Terroir Selection label? Lesser quality (and associated lesser price) wine? Completely different wine program that parallels their Estate line? Is Thomas Rivers Brown in charge of the Terroir Selection wine program as well?

Any help is appreciated.

PS - Sorry if this is in the wrong section. My initial thought was that there may be some distributors in here that are in the know.