OpinionLab is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.
Viadeo has better usage coverage in more websites categories. Including Business & Industry, People & Society, Career & Education, Internet & Telecom and 60 other categories.
OpinionLab is leading in Travel, Accommodation & Hotels, Shopping, Finance and 53 other categories.
OpinionLab is leading in most countries, including United States, United Kingdom, Germany, Canada and 54 other countries.
Viadeo is leading in France, Morocco, Tunisia, Belgium and 21 other countries.