Usablenet is leading in Top 1M Sites.
w3roi has better usage coverage in more websites categories. Including Internet & Telecom, Business & Industry, Computer & Electronics, Health and 26 other categories.
Usablenet is leading in Shopping, Arts & Entertainment, Sports, Clothing and 22 other categories.
Usablenet is leading in most countries, including United States, United Kingdom, Spain, Italy and 9 other countries.
w3roi is leading in China, Brazil, Switzerland, Sweden and 4 other countries.