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, Software, Internet & Telecom, Marketing & Advertising and 8 other categories.
Eulerian is leading in most countries, including France, Russia, United Kingdom, Canada and 16 other countries.
Observer is leading in United States, Ukraine, Australia, Finland and one other country.