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 127 other categories.
MSN Ads is leading in People & Society, Computer & Electronics, Software, Adult and 27 other categories.
Ad Butler is leading in most countries, including United States, United Kingdom, Belarus, Canada and 81 other countries.
MSN Ads is leading in Taiwan, Algeria, Slovakia, Korea Republic and 3 other countries.