Share 'What are the differences between the San Marino, Rancho and Ontario Roc Molds?'

I have an '08 Champion San Marino Roc I have been throwing for about a year now.  It is the only Roc I have, but I see there are other molds besides the San Marino like the Rancho and Ontario.I am curious as to what the differences are between these molds when thrown.  Is one particular mold more overstable, stable, understable?Also, what about the new Star Roc+...has anyone thrown one of these y…