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, Internet & Telecom, Arts & Entertainment and 88 other categories.
TruEffect is leading in People & Society, News & Media, Performing Arts, TV & Video and 16 other categories.
Yahoo Search Marketing Analytics is leading in most countries, including United States, Japan, South Korea, Taiwan and 30 other countries.
TruEffect is leading in Montenegro, Italy, Finland, Austria and 15 other countries.