There is NO comparison between Office 365 and Google Apps.
All major American cities use Office 365, including New York City, Chicago, San Francisco, Minnesota and the entire State of California.
In contrast, the only big city using Google Apps, Los Angeles, is current dropping Google for non-fulfillment of contractual obligation.
http
/www.computerworld.com/s/article/9223227/LAPD_Drops_Google_Apps_Plan
All HUGE private and public institutions are using OFFICE 365 -- Dept of VA (600,000), SUNY system (700,000), Toyota, Ford, Johnson & Johson, Merck, etc ..
In contrast, Googe Apps are used by the tiny firms and institutions -- Orlando, Pittsburgh, Dept of Interior Design, etc ..
Google has a history of distorting and exaggerating numbers to boost their resuls You have to be very careful using Google statistics.