ClickDensity is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
ClickDensity has better usage coverage in more websites categories. Including Business & Industry, Shopping, Classifieds, Autos & Vehicles and 83 other categories.
FriendFeed is leading in People & Society, Arts & Entertainment, News & Media, Internet & Telecom and 57 other categories.
ClickDensity is leading in most countries, including United States, United Kingdom, France, Poland and 43 other countries.
FriendFeed is leading in Russia, Turkey, Japan, Italy and 25 other countries.