Proclivity is leading in Top 100K Sites and Top 1M Sites.
Proclivity has better usage coverage in more websites categories. Including Sports, Health, Football, Medicine and 31 other categories.
Vertical Leap is leading in Tourism and Travel.
Proclivity is leading in most countries, including United States, United Kingdom, Germany, Canada and 11 other countries.
Vertical Leap hasn't got a lead over Proclivity in any country.