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Tumblr is leading in Top 1M Sites and The Entire Web.
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bbPress is leading in Top 10K Sites and Top 100K Sites.
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Tumblr has better usage coverage in more websites categories. Including Arts & Entertainment, Adult, Games, Lifestyle and 19 other categories.
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bbPress is leading in Law & Government.
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Tumblr is leading in most countries, including United States, Canada, United Kingdom, Germany and 119 other countries.
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bbPress is leading in China, Iran, Pakistan, Kenya and 32 other countries.