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 118 other categories.
Spark Studios is leading in Basketball and Humor.
Ad Butler is leading in most countries, including United States, United Kingdom, Canada, India and 80 other countries.
Spark Studios hasn't got a lead over Ad Butler in any country.