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Undertone Networks is leading in Top 100K Sites, Top 1M Sites and The Entire Web.
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Yahoo Overture is leading in Top 10K Sites.
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Undertone Networks has better usage coverage in more websites categories. Including Arts & Entertainment, Games, Computers Electronics & Technology, News & Media and 19 other categories.
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Yahoo Overture is leading in Business & Consumer Services.
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Undertone Networks is leading in most countries, including United States, Taiwan, Russia, France and 97 other countries.
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Yahoo Overture is leading in Japan, South Korea, Philippines, India and 12 other countries.