Marktest is leading in Top 10K Sites and Top 100K Sites.
Vizu has better usage coverage in more websites categories. Including People & Society, News & Media, Arts & Entertainment, Technology News and 76 other categories.
Marktest is leading in Newspapers.
Vizu is leading in most countries, including India, United Kingdom, Canada, Brazil and 46 other countries.
Marktest hasn't got a lead over Vizu in any country.