I would have to entirly disagree with you on that point.
i'm really positive that differences donot only remain on features and power ratings, however the answer to his original question remains unanswered, does a particular gear have any "sound quality" differences over an other particular gear.

7.1.4 * MRX1120 * M100s * 180HP * 4x M3-on walls * 4x M3-IC * dual XV15se * Shakers