TruEffect is leading in Top 100K Sites and Top 1M Sites.
Yahoo Search Marketing Analytics has better usage coverage in more websites categories. Including Business & Industry, Shopping, Arts & Entertainment, Internet & Telecom and 87 other categories.
TruEffect is leading in People & Society, News & Media, Performing Arts, TV & Video and 15 other categories.
Yahoo Search Marketing Analytics is leading in most countries, including Japan, United States, South Korea, Taiwan and 36 other countries.
TruEffect is leading in Montenegro, Italy, Finland, Austria and 18 other countries.