Marktest is leading in Top 10K Sites.
Rich has better usage coverage in more websites categories. Including Sports, Internet & Telecom, Soccer, Online Marketing and one other category.
Marktest is leading in Newspapers, News & Media, TV & Video and Music & Audio.
Rich is leading in most countries, including Sweden, Norway, United States, Netherlands and 3 other countries.
Marktest is leading in Brazil, Portugal and Italy.