MerchantAdvantage is leading in Top 100K Sites and Top 1M Sites.
MerchantAdvantage has better usage coverage in more websites categories. Including Shopping, Business & Industry, Home & Garden, Health and 35 other categories.
PriceGrabber is leading in Marketing & Advertising, Music, Children, Government and one other category.
MerchantAdvantage is leading in most countries, including United States, Great Britain, Canada, Spain and 12 other countries.
PriceGrabber is leading in Puerto Rico, India and Greece.