some indicators
From the C30 class site:"During its long production run, the C30 was built in four rigging configurations and three major models or styles. There are three types of keels; the original 5' 3" deep keel is still preferred for all-around performance where water depth is no problem. The early 4' 5" shoal keel has been replaced by the modern 3' 10" deep wing keel. According to the factory, all hulls share the same dimensions and overall weight."I can't find and hard numbers, but the deep keel and the wing keel don't seem to rate differently under PHRF. The different rig configurations do.The deep keel only draws 5'3", the wing 3'10".If 5'3" will keep you out of places you want to go, the wing is a valid choice.