MSN Ads is leading in Top 10K Sites and Top 100K Sites.
Shopzilla has better usage coverage in more websites categories. Including Shopping, Arts & Entertainment, Business & Industry, Clothing and 85 other categories.
MSN Ads is leading in People & Society, News & Media, Computer & Electronics, Music & Audio and 49 other categories.
MSN Ads is leading in most countries, including Canada, Spain, Ukraine, Australia and 26 other countries.
Shopzilla is leading in United States, India, United Kingdom, Russia and 18 other countries.