Ceros is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Zmags has better usage coverage in more websites categories. Including Science & Education, Heavy Industry & Engineering, Food & Drink, Travel & Tourism and 9 other categories.
Ceros is leading in Finance, Computers Electronics & Technology, Business & Consumer Services, Health and 7 other categories.
Ceros is leading in most countries, including United States, Canada, India, France and 59 other countries.
Zmags is leading in United Kingdom, Norway, Denmark, Sweden and 43 other countries.