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 26 other categories.
FredHopper is leading in Shopping, Business & Industry, Clothing, Home & Garden and 22 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Netherlands, Germany and 26 other countries.
w3roi is leading in United States, China, India, Brazil and 2 other countries.