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, Consumer Electronics and 83 other categories.
MSN Ads is leading in People & Society, News & Media, Computer & Electronics, Music & Audio and 54 other categories.
MSN Ads is leading in most countries, including Canada, India, Brazil, United Kingdom and 34 other countries.
Shopzilla is leading in United States, Israel, Ireland, Norway and 14 other countries.