In terms of market share, RetailMaven is clearly lagging behind, losing to Unicast in all segments.
RetailMaven has better usage coverage in more websites categories. Including Arts & Entertainment, Music & Audio, Business & Industry and Shopping.
Unicast is leading in Performing Arts.
RetailMaven is leading in most countries, including Australia and United States.
Unicast hasn't got a lead over RetailMaven in any country.