MerchantAdvantage is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
WordStream has better usage coverage in more websites categories. Including Business & Industry, People & Society, Relationships & Dating, Autos & Vehicles and 38 other categories.
MerchantAdvantage is leading in Shopping, Home & Garden, Health, Products & Shopping and 23 other categories.
MerchantAdvantage is leading in most countries, including United States, Canada, Iran, Italy and 9 other countries.
WordStream is leading in United Kingdom, South Africa, Mexico, Australia and 8 other countries.