InsightExpress is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
InsightExpress has better usage coverage in more websites categories. Including People & Society, Arts & Entertainment, News & Media, Business & Industry and 79 other categories.
Observer is leading in Computer & Electronics, Software, Photography, Programming and 5 other categories.
InsightExpress is leading in most countries, including United States, China, Canada, Russia and 41 other countries.
Observer is leading in United Kingdom, Ukraine, Sweden, Belgium and one other country.