User blog comment:TEmpestfEast/Alliance Battle/Duel/@comment-24069043-20140714044441

You have higher chance to obtain all of the individual rewards during the AB. Because you have almost all the hours to battle.

Heck, there's even a larger reward for beating stronger opponents. Not fixed points per fight. Also heavier penalty if you score streaks alone. (nobody else in your Alliance is battling, except you)