Usablenet is leading in Top 1M Sites.
WebProspector has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Marketing & Advertising, Computer & Electronics and 37 other categories.
Usablenet is leading in Shopping, Sports, Clothing, Autos & Vehicles and 17 other categories.
WebProspector is leading in most countries, including Germany, Austria, Switzerland, Portugal and 9 other countries.
Usablenet is leading in United States, United Kingdom, Spain, India and 7 other countries.