SpotX is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
SpotX has better usage coverage in more websites categories. Including Arts & Entertainment, News & Media, Autos & Vehicles, Car Buying and 101 other categories.
Unicast is leading in Performing Arts.
SpotX is leading in most countries, including United States, Germany, Netherlands, United Kingdom and 50 other countries.
Unicast hasn't got a lead over SpotX in any country.