ClickDimensions is leading in Top 100K Sites and Top 1M Sites.
ClickDimensions has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Software, Health and 92 other categories.
FriendFeed is leading in People & Society, Arts & Entertainment, News & Media, Internet & Telecom and 51 other categories.
ClickDimensions is leading in most countries, including United States, United Kingdom, Canada, Australia and 63 other countries.
FriendFeed is leading in Russia, Italy, Turkey, Japan and 20 other countries.