In a duel, I am sure it would be very close, actually. Akou wins high or extreme.
Akou is the far far superior commander though. Even though he wins the war, what probably makes it look better for Batei is that Akou's style of choice would be to fight head on, which is Batei's game too. So Akou would win with a good degree if difficulty more often than not.
But if there is ever a plot scenario where Akou has to be a little smarter for whatever reason, then there isn't a damn thing Batei could do about it.