Osvaldo, I agree with John, I never trust those retail stores in regards to having things setup correctly. There is no way to tell if both receivers where setup and calibrated for best sound. Both models are great receivers, however, if both receivers were calibrated correctly, you would not hear much difference if any. The room characteristics play a more important role than the receiver and/or speakers you may be using. Also, I'm sure he was not using Axiom speakers either.
Congratulations on your purchase...
