In terms of market share, Observer is clearly lagging behind, losing to w3roi in all segments.
Observer has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Arts & Entertainment, People & Society and 19 other categories.
w3roi is leading in Internet & Telecom, Health, Shopping, Career & Education and 18 other categories.
Observer is leading in most countries, including Russia, France, Ukraine, Sweden and 4 other countries.
w3roi is leading in United States, China, India, United Kingdom and 3 other countries.