Only a small difference in load, not enough to split the fleet, however there is a huge difference in quality and reliability. The Boeing product is far superior to Airbus.
The Airbus would be sitting on the ramp broke, waiting for parts. Its an over engineered, overpriced piece of junk, a throw away a/c that breaks up into tiny little pieces.
The Boeing a 767 is proven, with much higher reliability and lower maintenance cost. Just make sure to hang Pratts on it.
For the military there is but one intelligent choice Boeing 767 / Pratts
So why did the USAF select the Airbus product in 2008???
Do you have a dog in this fight?