Usablenet is leading in Top 10K Sites, 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 65 other categories.
Usablenet is leading in Business & Industry, Shopping, Death, Travel and 29 other categories.
Vizu is leading in most countries, including Indonesia, Netherlands, France, Germany and 11 other countries.
Usablenet is leading in United States, United Kingdom, Japan, Spain and 9 other countries.