FredHopper is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
w3roi has better usage coverage in more websites categories. Including Internet & Telecom, Computer & Electronics, Health, Career & Education and 24 other categories.
FredHopper is leading in Shopping, Business & Industry, Clothing, Home & Garden and 23 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Germany, Netherlands and 21 other countries.
w3roi is leading in United States, China, Brazil, India and one other country.