Mercent is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
OMG has better usage coverage in more websites categories. Including Shopping, Coupons, Arts & Entertainment, Travel and 80 other categories.
Mercent is leading in Clothing, Games, Home & Garden, Video Games and 29 other categories.
Mercent is leading in most countries, including United States, Canada, Philippines, Romania and 40 other countries.
OMG is leading in India, United Kingdom, Turkey, Russia and 27 other countries.