Blueshift is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Marktest has better usage coverage in more websites categories. Including People & Society, Music & Audio, Arts & Entertainment, Soccer and 4 other categories.
Blueshift is leading in Internet & Telecom, Search Engine and Shopping.
Marktest is leading in most countries, including Brazil, Portugal and France.
Blueshift is leading in India and United Kingdom.