Alphabet may be compared to Apple in many respects, and vice versa, but there's one area where Cupertino soundly bests Mountain View: devices. On one hand, Apple's iPhone alone is responsible for $147 billion in revenueover the trailing 12-months versus Alphabet's total haul of $70 billion. Alphabet, on the other hand, has struggled with devices. After buying Motorola Mobility for $12.5 billion in 2011, the company sold the division to Lenovo for $2.9 billion after years of red ink, although it should be noted the company kept certain high-value patents and sold off a portion of the business to Arris for $2.5 billion as well as keeping Motorola's $3.2 billion cash pile at the time of acquisition.