Why should it sound better?
More power does not mean better sound, better power does. How much more useless crap, say on the video side, did the more expensive receiver have. It seems to me when it comes to A.V. receivers that what one pay for. More buttons, more options, and more video stuff. How much of this has to do with the quality of sound it can produce, in terms of music, not much! I am a firm believer the more crap a signal has to pass trought the worse it sounds. More money does not always equal better sound, especially when talking about A.V. receivers. Your little demonstration proves that.