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, Health, Computer & Electronics, Career & Education and 25 other categories.
FredHopper is leading in Shopping, Business & Industry, Clothing, Home & Garden and 20 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Netherlands, Germany and 27 other countries.
w3roi is leading in United States, China, India, Canada and 4 other countries.