Mace was the best or lets say second best of his time, behind Yoda. Kun was the best of his time and beat his master with relative ease. We can say Vodo had no defense for Kun because he has never seen the style nor knew how to defend against it. Then again the Jedi of Mace's time were familiar with the double bladed style. It's a tough one but I'd have to go with Kun because he was the best duelist in a martial time.
The style was invented 4000 years earlier by Exar Kun who passed it on to... nobody. Other double-sabers have been shown to be of the staff-hilted variety and are different from Kun's short hilt.
That and there's this great point that the PT Jedi are totally uninformed about a lot of things.
"The Sith have been extinct for a millenia!"
I highly doubt they knew so much more about it that they'd put up a better showing than Vodo, known to be a more experienced warrior.
That's like saying because I know about nuclear weapons, I'm more prepared to survive or otherwise resist one than someone who hasn't seen one before. The problem is, I'm still unfamiliar with the weapon and I've not been preparing for it; I don't have any lead suits in my house.
Originally posted by tdtd
Assuming they don't know how to adjust to it and since they thought the Sith were extinct for a millennium I guess their incompetence would show with the proper way to combat Kun's style.
The Jedi were incompetent enough to the point that one one in the order had even seen a Sith until Qui-Gon brought it to their attention. No one in the order used a double-bladed lightsaber, much less a short-hilt double-bladed lightsaber.
Could Mace have heard of it? Sure, but that doesn't mean he will have any clue how to stop it. It won't be much of an advantage for him.
Also, Mace would know next to nothing about Kun's style, Kun didn't pass it on to anyone, and most everyone he dueled ended up dead. Kun wouldn't know Mace's style either, they'd go into the fight blind, but Kun's saber superiority wins the fight.