AdMob is leading in Top 100K Sites and Top 1M Sites.
AdMob has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, Business & Industry, Internet & Telecom and 63 other categories.
Harren Media is leading in Humor, Baseball, Email, Nursery & Playroom and one other category.
AdMob is leading in most countries, including Japan, Italy, Indonesia, United States and 51 other countries.
Harren Media is leading in Brazil, Mexico and Peru.