Difference between Icloud and Dropbox

NEW YORK, NY – APRIL 29: Aditya Agarwal, VP of Engineering at Dropbox and Joe Green of FWD speak onstage at the TechCrunch Disrupt NY 2013 at The Manhattan Center on April 29, 2013 in New York City. (Photo by Brian Ach/Getty Images for TechCrunch)