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 75 other categories.
TruEffect is leading in People & Society, News & Media, Performing Arts, Games and 15 other categories.
Yahoo Search Marketing Analytics is leading in most countries, including United States, Japan, Taiwan, Korea Republic and 29 other countries.
TruEffect is leading in France, Greece, Egypt, United Arab Emirates and 9 other countries.