Vizzit is leading in Top 100K Sites and Top 1M Sites.
w3roi has better usage coverage in more websites categories. Including Internet & Telecom, Business & Industry, Health, Computer & Electronics and 24 other categories.
Vizzit is leading in Science, Social Sciences, Law & Government, Government and 19 other categories.
w3roi is leading in most countries, including United States, China, India, Canada and 8 other countries.
Vizzit is leading in Sweden, Italy, Bulgaria, Belarus and 2 other countries.