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, Arts & Entertainment, Computer & Electronics, People & Society and 22 other categories.
Vertster is leading in Computer Hardware, Search Engine, Relationships & Dating, Womens Interests and 5 other categories.
Observer is leading in most countries, including United States, Russia, Japan, Germany and 7 other countries.
Vertster is leading in Australia, Slovenia, Brazil and United Kingdom.