ClickDensity is leading in Top 100K Sites and Top 1M Sites.
ClickDensity has better usage coverage in more websites categories. Including Business & Industry, Shopping, Classifieds, Autos & Vehicles and 82 other categories.
FriendFeed is leading in People & Society, Arts & Entertainment, News & Media, Internet & Telecom and 56 other categories.
FriendFeed is leading in most countries, including Russia, Spain, Germany, Italy and 50 other countries.
ClickDensity is leading in United States, United Kingdom, Czech Republic, Poland and 30 other countries.