FredHopper is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
FredHopper has better usage coverage in more websites categories. Including Shopping, Business & Industry, Clothing, Home & Garden and 26 other categories.
Observer is leading in Arts & Entertainment, Computer & Electronics, Internet & Telecom, People & Society and 21 other categories.
FredHopper is leading in most countries, including United Kingdom, France, Germany, Netherlands and 28 other countries.
Observer is leading in Japan, Brazil, China and Algeria.