Bluemetrix is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Bluemetrix has better usage coverage in more websites categories. Including Business & Industry, Real Estate, Shopping, Arts & Entertainment and 32 other categories.
Observer is leading in Computer & Electronics, People & Society, Internet & Telecom, Software and 15 other categories.
Bluemetrix is leading in most countries, including Japan, United Kingdom, United States, Ireland and 30 other countries.
Observer is leading in Russia, France and Turkey.