Foursquare Widget is leading in Top 10K Sites and Top 100K Sites.
Foursquare Widget has better usage coverage in more websites categories. Including Arts & Entertainment, Travel, Food & Drink, People & Society and 103 other categories.
Viadeo is leading in Business & Industry, Career & Education, Marketing & Advertising, Education and 32 other categories.
Foursquare Widget is leading in most countries, including United States, Russia, Brazil, Italy and 69 other countries.
Viadeo is leading in France, Morocco, Tunisia, Cameroon and 30 other countries.