Vizzit is leading in Top 100K Sites and Top 1M Sites.
w3roi has better usage coverage in more websites categories. Including Internet & Telecom, Computer & Electronics, Health, Software and 19 other categories.
Vizzit is leading in Science, Social Sciences, Business & Industry, Law & Government and 18 other categories.
w3roi is leading in most countries, including United States, China, India, United Kingdom and 5 other countries.
Vizzit is leading in Sweden, Germany, Norway, Finland and 2 other countries.