Usablenet is leading in Top 100K Sites.
Usablenet has better usage coverage in more websites categories. Including Shopping, Business & Industry, Consumer Electronics, Sports and 31 other categories.
Vizzit is leading in Science, Social Sciences, Law & Government, Government and 16 other categories.
Usablenet is leading in most countries, including United States, United Kingdom, Spain, Italy and 7 other countries.
Vizzit is leading in Sweden, Viet Nam, Norway, Germany and one other country.