The A320 uses carbon brakes!
Unlike some other Boeing aircraft...i.e. 737/757 that use steel brakes, carbon brakes wear is related to applications. NOT directly to the energy applied during each application.
So you can see that carbon brakes absorb more energy therefore performance is better, and the wear is less. especially at higher temperatures.
the reason mx work is higher on the 32o's is because pilots apply more applications taxiing, rather than taxi single engine, brake to a lower speed with fewer applications...
thanks and lets have fun out there shall we!!