I whipped up a quick comparison of Perf and ORRez corrected times. I used Random Medium rating, seemed on the edge of light and Medium. Cal 35 averaged over 6 knts for a lot of the race so I have a hard time calling it light. Note that the Cal 35 changed the PHRF rating to only use 135 genoa, ORRez rating still includes 155 Genoa. Cal 35 probably still wins in ORRez with the correct rating. Also, I swiped an OD J-80 rating, not sure if the J-80s racing fall under OD.
-J