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, People & Society and 25 other categories.
Vertster is leading in Computer Hardware, Relationships & Dating, Womens Interests, Science and 5 other categories.
Observer is leading in most countries, including United States, Russia, France, United Kingdom and 8 other countries.
Vertster is leading in Australia and Canada.