Empire is outselling Republic
This just in from my Comic Book Store Owner: Empire sells out for him, while Republic doesn't do as well.
Empire has focused on Darth Vader, then Princess Leia and Captian Antilles, Boba Fett, and now Luke Skywalker and Biggs Darklighter.
Republic has focused on Anakin Skywalker, Obi-Wan Kenobi, Shaak-Ti, Quinlan Vos, Count Dooku, Asaaj Ventress, Durge, and The ARC Trooper, during the Clone Wars.
While I love both and really dig a chance to see the Clone Wars, Empire - an equally interesting, if IMO less exciting comic, outsells Republic at my comic shop FYI.