Usablenet is leading in Top 100K Sites and Top 1M Sites.
Usablenet has better usage coverage in more websites categories. Including E-commerce & Shopping, Food & Drink, Vehicles, Health and 9 other categories.
Vizu is leading in Adult and News & Media.
Usablenet is leading in most countries, including United States, United Kingdom, Canada, Chile and 5 other countries.
Vizu is leading in France, Indonesia, Netherlands, Romania and 2 other countries.