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 49 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, United Kingdom, Germany, United States and 13 other countries.
Observer is leading in Russia, Ukraine, Sweden, Japan and 2 other countries.