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, Finance, Shopping and 95 other categories.
Whichit is leading in Alternative & Natural Medicine.
Ceros is leading in most countries, including United States, United Kingdom, South Africa, Spain and 64 other countries.
Whichit hasn't got a lead over Ceros in any country.