Nah, Mace would definately win this one. He was a prodigy of sorts, being the youngest Jedi Master on the Council, he perfected Form VII fighting style... and he could hang with Sidious one on one. Jolee didn't have the discipline to become a worthy master, he was not a good saber fighter, and he definately could not duel with Sidious.
Mace wins.
You often see it in cultures and mythology more then in anything...
The old are the most poweful, society weakens... Strength lowers and people become more lazy, if you remember from Kotor you go to the Rakatan planet, they used to all have the force.. During the time of Kotor only a few had it, and none knew how to use it.
Using that logic you could easily say the force weakens in races by time and the old are more powerful then the new. By that logic Jolee would win, however i'm still going with Mace...
Personally i think he is a better fighter and could get close enough to Jolee to slice him open. Besides for all we know the only reason they were more powerful was because they had a greater knowledge about what the force trully was, something that was later on destroyed.