Usablenet is leading in Top 100K Sites and Top 1M Sites.
Vizu has better usage coverage in more websites categories. Including People & Society, News & Media, Arts & Entertainment, Technology News and 71 other categories.
Usablenet is leading in Shopping, Clothing, Home & Garden, Consumer Electronics and 10 other categories.
Vizu is leading in most countries, including Indonesia, Brazil, India, Canada and 18 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Russia and 4 other countries.