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Mopinion is leading in Top 100K Sites and Top 1M Sites.
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Quantcast Widget has better usage coverage in more websites categories. Including Reference Materials, Community & Society, Hobbies & Leisure, Law & Government and 14 other categories.
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Mopinion is leading in Finance, Jobs & Career and Vehicles.
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Quantcast Widget is leading in most countries, including United States, United Kingdom, Canada, Spain and 17 other countries.
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Mopinion is leading in Netherlands, Japan, South Korea, Slovakia and 2 other countries.