Open AdExchange is leading in Top 100K Sites.
Open AdExchange has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, People & Society and 26 other categories.
Testnet is leading in Autos & Vehicles, Cooking & Recipes, Food & Drink, Beauty and 3 other categories.
Open AdExchange is leading in most countries, including Denmark, Netherlands, Guatemala, Italy and 3 other countries.
Testnet is leading in Belgium and France.