GSI Media is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Spark Studios has better usage coverage in more websites categories. Including Arts & Entertainment, Computer & Electronics, Energy, Weight Loss and 17 other categories.
GSI Media is leading in Shopping, Clothing, Children, Sports and one other category.
Spark Studios is leading in most countries, including Brazil, Portugal and France.
GSI Media is leading in United States.