"It was stated that Kun was a lightsaber prodigy. He had no equal during his life."
Ulic Quel-Droma rings a bell? I am not saying he was not good but when he fought Quel-Droma, before Ragnos showed up, the narrator said they were even.
My opinion, i think none of them have the advantage, they are pretty much equal to me...
Also, sorry to insist on this but, when it was stated exar kun>ragnos?