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 yet and how do they compare to the other three molds?

[Godfather]

I talked to Steve Wisecup, who makes the roc+'s, and he says they fly exactly the same as other rocs from the same factory.  It is ONLY a difference in the slope of the rim.  The sloped rim of the roc+ is easier to hold for people with smaller hands.

[greasycooter]

if your looking for a great Roc i suggest the 11 kcpro great plastic overstable enough to wrench on it without worries.  its the only innova mid range i throw.. 

[Rob Toltzman]

I've been using a 2004 Super Roc, very stable Rancho. I use a 2005 SB Roc for short drives, holds hyzer well. I beleive that one is an Ontario.

 

Best disc ever made.

[LEE CASTRO]

My favorite disc is a very old seasoned ontario dx roc,for some reason this disc has held on to the flight path real well even after 8 years of heavy use,i also throw a star san marino and it works great on those windy days when you need a little more stability.