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, People & Society, Food & Drink and 104 other categories.
Viadeo is leading in Business & Industry, Career & Education, Marketing & Advertising, Education and 28 other categories.
Foursquare Widget is leading in most countries, including Brazil, United States, Russia, Italy and 81 other countries.
Viadeo is leading in France, Switzerland, Morocco, Tunisia and 22 other countries.