Nope. Rating systems based on polars - which are VPP based - are a "simplification" of the real world that ignore important factors like waves (and a number of other tertiary effects on boat performance) . PHRF uses real world results - no simplification. Why you can build/modify/optimize a boat to any VPP rating system - giving you a VPP (rating) edge that is not based on real boat speed changes (ie you can make your boat rate slower then it really is). Whereas you cannot run this scam on PHRF. Sure PHRF has its problems too - for custom and low production boats where there is insufficient real world performance data - and infrequent (and too often sited) PHRF committee favoritism. If you think about how close these rating systems need to be to be deemed "fair"... predicting performance within 1% (6 seconds per mile or so)... its hard to get right.