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, People & Society, Video Games and 18 other categories.
GSI Media is leading in Shopping, Internet & Telecom, Children, Clothing and 5 other categories.
GSI Media is leading in most countries, including United States, Canada, Germany, China and one other country.
Spark Studios is leading in Portugal and France.