Marktest is leading in Top 10K Sites and Top 100K Sites.
Uptrends has better usage coverage in more websites categories. Including People & Society, Business & Industry, Arts & Entertainment, Shopping and 56 other categories.
Marktest is leading in Newspapers, Soccer and TV & Video.
Uptrends is leading in most countries, including Netherlands, Belgium, France, Turkey and 19 other countries.
Marktest is leading in Portugal and Brazil.