WebProspector is leading in Top 100K Sites and Top 1M Sites.
YellowTracker has better usage coverage in more websites categories. Including Arts & Entertainment, People & Society, News & Media, Shopping and 50 other categories.
WebProspector is leading in Business & Industry, Internet & Telecom, Marketing & Advertising, Computer & Electronics and 20 other categories.
YellowTracker is leading in most countries, including Netherlands, Belgium, Poland, Canada and 9 other countries.
WebProspector is leading in Germany, Austria, France, India and 5 other countries.