Prust's victory was no more slim than Rypien's victory later on in the same game.
Anyway, how can you possibly use fights from last year as proof that Rypien is the better fighter NOW? That's like using stats from previous years to prove who the better player is now. It doesn't work that way.
Prust is CLEARLY a much better fighter than he was last year, therefore those first two fights mean nothing when it comes to who the better fighter is NOW.
They're pretty even in my books and at least Prust isn't into the show-boating stuff either.
So if fighter A is 30-0, and another fighter B is 0-30, and they go at it, and fighter B wins, you would conclude the fighter B is the better fighter, currently? Further, if they fought 10 times, and fighter A won 9, but fighter B won the most recent, you'd conflude he is the better fighter? Precedent doesn't mean anything?
By your argument, since Alex Burrows is tied for 11th in goal scoring, you would conclude he is a better scorer today than Kane, Parise, J Carter, Malkin, Toews, Lecavalier? Do you agree with that assessment?
Prust has improved, but one victory does not make him equal, or close to it. You have no way of knowing if it was just an off night for Rypien. That's why you use a sample size.