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, Internet & Telecom, Computer & Electronics and 58 other categories.
Harren Media is leading in Home & Garden, Nursery & Playroom, Email, Classifieds and one other category.
AdMob is leading in most countries, including Japan, Indonesia, Italy, United States and 47 other countries.
Harren Media is leading in Brazil, Argentina, Peru, Spain and 6 other countries.