Blueshift is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Observer has better usage coverage in more websites categories. Including Business & Industry, Computer & Electronics, Arts & Entertainment, People & Society and 26 other categories.
Blueshift is leading in Shopping and Search Engine.
Observer is leading in most countries, including United States, Russia, France, Ukraine and 8 other countries.
Blueshift is leading in India.