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, Financial Management and 55 other categories.
Observer is leading in Computer & Electronics, Internet & Telecom, Software, Marketing & Advertising and 9 other categories.
Eulerian is leading in most countries, including France, United Kingdom, Italy, Canada and 16 other countries.
Observer is leading in Russia, Brazil, Japan, Sweden and 7 other countries.