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 88 other categories.
DoubleClick AdExchange is leading in News & Media, Autos & Vehicles, Sports, TV & Video and 15 other categories.
OMG is leading in most countries, including India, United Kingdom, Poland, Russia and 32 other countries.
DoubleClick AdExchange is leading in United States, Germany, China, Turkey and 25 other countries.