In terms of market share, Observer is clearly lagging behind, losing to Vertster in all segments.
Observer has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Arts & Entertainment, Internet & Telecom and 28 other categories.
Vertster is leading in Computer Hardware, Computer Security, Agriculture & Forestry, Science and 4 other categories.
Observer is leading in most countries, including Russia, United States, United Kingdom, Ukraine and 10 other countries.
Vertster hasn't got a lead over Observer in any country.