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 18 other categories.
Observer is leading in Arts & Entertainment, Computer & Electronics, People & Society, Internet & Telecom and 16 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Netherlands, Germany and 23 other countries.
Observer is leading in United States, Russia, Mexico, Korea Republic and 2 other countries.