Ad Butler is leading in Top 100K Sites and Top 1M Sites.
Ad Butler has better usage coverage in more websites categories. Including Business & Industry, News & Media, Arts & Entertainment, Sports and 108 other categories.
MSN Ads is leading in Games, Technology News, Fishing, Animation & Comics and 12 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, Russia and 70 other countries.
MSN Ads is leading in Indonesia, Czech Republic, Philippines, New Zealand and 5 other countries.