Agreed.
However, if you measure in sales Amazon (61B) beats UPS (54B) And Amazon will top 75B for 2013
If you measure in Assets Amazon (32B) is slightly smaller than UPS (38B)
If you measure in profits UPS crushes Amazon's net loss.
But Amazon is all about growth at this stage (a staggering $100B in projected sales for 2014)
Amazon's average 5 year growth rate (38%) surpasses Google, Intel, Oracle, and Microsoft.
They will soon dwarf UPS, with double our annual sales in 2014 and continuing to grow rapidly.
http://247wallst.com/retail/2013/12/29/amazon-could-reach-100-billion-revenue-in-2014/