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, People & Society, Food & Drink and 90 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, Brazil, Russia, Italy and 59 other countries.
Viadeo is leading in France, Morocco, Algeria, New Caledonia and 23 other countries.