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 88 other categories.
Viadeo is leading in Business & Industry, Career & Education, Marketing & Advertising, Education and 33 other categories.
Foursquare Widget is leading in most countries, including United States, Brazil, Russia, Ukraine and 58 other countries.
Viadeo is leading in France, Morocco, Tunisia, Algeria and 21 other countries.