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 82 other categories.
FriendFeed is leading in People & Society, Arts & Entertainment, News & Media, Internet & Telecom and 58 other categories.
ClickDensity is leading in most countries, including United States, United Kingdom, France, Poland and 51 other countries.
FriendFeed is leading in Russia, Italy, Turkey, Japan and 24 other countries.