Eulerian is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Eulerian has better usage coverage in more websites categories. Including Business & Industry, Finance, Shopping, Travel and 47 other categories.
Observer is leading in Computer & Electronics, Internet & Telecom, Software, Marketing & Advertising and 7 other categories.
Eulerian is leading in most countries, including France, United States, United Kingdom, Spain and 9 other countries.
Observer is leading in Japan, Mexico, Korea Republic and Hong Kong.