Ceros is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Ceros has better usage coverage in more websites categories. Including Business & Industry, Arts & Entertainment, Shopping, Travel and 66 other categories.
Whichit hasn't got a lead over Ceros in any websites category.
Ceros is leading in most countries, including United States, United Kingdom, Spain, South Africa and 39 other countries.
Whichit is leading in Austria.