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, Computer & Electronics, Health and 24 other categories.
Vizzit is leading in Social Sciences, Science, Law & Government, Government and 20 other categories.
w3roi is leading in most countries, including United States, China, India, Russia and 8 other countries.
Vizzit is leading in Sweden, Italy, Norway, Denmark and 5 other countries.