They're not really comparable services though. FedEx focus is on time sensitiveness deliveries (over night/2-day/etc) as well as fast international deliveries.

They're not really comparable services though. FedEx focus is on time sensitiveness deliveries (over night/2-day/etc) as well as fast international deliveries. Ground is a major part of their business, but it's still secondary. UPS primary focus is ground, with overnight there to stay competitive. Does Amazon have minimum contracts with UPS? Seems like they wouldn't if they're below 10%.