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 73 other categories.
Usablenet is leading in Shopping, Clothing, Sports, Autos & Vehicles and 12 other categories.
Vizu is leading in most countries, including India, Indonesia, Poland, Canada and 17 other countries.
Usablenet is leading in United States, United Kingdom, Spain, Chile and 4 other countries.