DoubleClick AdExchange is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Spring Metrics has better usage coverage in more websites categories. Including Shopping, Business & Industry, Health, Arts & Entertainment and 90 other categories.
DoubleClick AdExchange is leading in News & Media, Tourism, TV & Video, Newspapers and 7 other categories.
Spring Metrics is leading in most countries, including United States, Canada, United Kingdom, Germany and 30 other countries.
DoubleClick AdExchange is leading in China, Turkey, Spain, Switzerland and 15 other countries.