DoubleClick AdExchange is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
OMG has better usage coverage in more websites categories. Including Shopping, Coupons, Business & Industry, Travel and 75 other categories.
DoubleClick AdExchange is leading in News & Media, Sports, Health, Autos & Vehicles and 36 other categories.
OMG is leading in most countries, including India, United Kingdom, Malaysia, Russia and 28 other countries.
DoubleClick AdExchange is leading in Germany, United States, China, Turkey and 26 other countries.