Foursquare Widget is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Foursquare Widget has better usage coverage in more websites categories. Including Arts & Entertainment, Travel, Food & Drink, People & Society and 107 other categories.
Viadeo is leading in Business & Industry, Career & Education, Marketing & Advertising, Education and 34 other categories.
Foursquare Widget is leading in most countries, including United States, Russia, Brazil, Italy and 72 other countries.
Viadeo is leading in France, Morocco, Algeria, Congo Republic and 26 other countries.