Social Dot Com is leading in Top 100K Sites and Top 1M Sites.
Social Dot Com has better usage coverage in more websites categories. Including Business & Industry, Health, Food & Drink, Finance and 21 other categories.
Visible Measures is leading in Software and Computer & Electronics.
Social Dot Com is leading in most countries, including United States, Spain, Sweden, Belgium and one other country.
Visible Measures hasn't got a lead over Social Dot Com in any country.