In terms of market share, ReferLocal is clearly lagging behind, losing to Testnet in all segments.
Testnet has better usage coverage in more websites categories. Including Sports, Food & Drink, Cooking & Recipes, Internet & Telecom and 6 other categories.
ReferLocal is leading in Business & Industry, Tourism, Travel, People & Society and 4 other categories.
ReferLocal is leading in most countries, including United States and Australia.
Testnet is leading in Belgium.