So what is the hull volume difference between the Viper and the Falcon? Which is the stiffer platform? What weight are the Falcons comming in at. For that matter, how many F16s weigh min weight, how many are 5 or more kg over min. Are there any F16s carring lead correctors.
There is a reason why the heavier Viper is so quick. It is a better hull design, has more voulme and is a stiffer platform.
All these weather you want to believe it or not, do make a difference.
As for boat weigh and handleing, as what Brett said.