My understanding is that MORC ratings are expressed in feet, ala IOR. The class had an upper level LOA of 30'. The boats raced on handicap, in different classes.
I think your answer would be better answered in a comparison of the boats MORC ratings. What sort of difference was there then? Not knowing much about MORC, I would hazard a guess that a stripped out MORC rater would rate much faster than a Racer cruiser MORC rater.