In terms of market share, Echo is clearly lagging behind, losing to Slashdot Widget in all segments.
Echo has better usage coverage in more websites categories. Including News & Media, Science, Adult, Arts & Entertainment and 9 other categories.
Slashdot Widget is leading in Internet & Telecom, People & Society, Shopping, Clothing and 7 other categories.
Echo is leading in most countries, including United States, Germany, Australia, Japan and one other country.
Slashdot Widget hasn't got a lead over Echo in any country.