FredHopper is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Usablenet has better usage coverage in more websites categories. Including People & Society, Travel, Accommodation & Hotels, Death and 36 other categories.
FredHopper is leading in Shopping, Business & Industry, Clothing, Home & Garden and 19 other categories.
FredHopper is leading in most countries, including France, United Kingdom, Germany, Netherlands and 32 other countries.
Usablenet is leading in United States, Japan, India, China and 5 other countries.