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, Travel, Shopping and 46 other categories.
Observer is leading in Computer & Electronics, Internet & Telecom, Software, Marketing & Advertising and 10 other categories.
Eulerian is leading in most countries, including France, United Kingdom, Italy, Belgium and 6 other countries.
Observer is leading in United States, Russia, Ukraine, Sweden and 3 other countries.