Sitespect is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Yahoo Search Marketing Analytics has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Arts & Entertainment, Health and 80 other categories.
Sitespect is leading in Shopping, Consumer Electronics, Clothing, Sports and 10 other categories.
Yahoo Search Marketing Analytics is leading in most countries, including Japan, Taiwan, Korea Republic, India and 30 other countries.
Sitespect is leading in United States, Netherlands, Belgium, Chile and 2 other countries.