One note about PHRF info:
The rating issuers get their boat designations from reading the forms submitted by the boat owners. Owners often are quite vague about what model of boat they sail...
For more confusion, unless the rating is for a box stock boat, it often reflects a boat that is non-standard in some way -- sail plan, keel changes, and etc.
So, to borrow that bit of dialog from "Pirates of the Caribbean",
These boat model names we read in lists on the 'net be more like... Guidelines than... Rules!
Arrrr!
LB