Blueshift is leading in Top 100K Sites and Top 1M Sites.
Observer has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Computer & Electronics, People & Society and 22 other categories.
Blueshift is leading in Shopping, Career & Education, Education, Jobs & Employment and 7 other categories.
Observer is leading in most countries, including United Kingdom, Russia, Germany, Ukraine and 7 other countries.
Blueshift is leading in India, United States and Viet Nam.