Clarity sound from SONY ES VS Onkyo

[BLURAYSONYES]

I currently own the SONY 4300ES receiver. Been owning and upgrading Sony ES equipments for the last 13yrs. I have the receiver setup the best possible sound but lately Ive noticed that a lot of my customers owning from the basic to the highest end onkyo receiver they all tend to sound so clear. Even at low volume! I did very minor adjustments to their receivers but still sound better than mine quite honestly. Am I missing something here? I mean having the best possible Boston Acoustic speakers around and still lacking that clarity while my customer have theirs hooked up with low end speakers. Most Sony ES receiver are higher priced than Onkyo receivers. Perhaps anyone out there with a SONY ES have better settings to get to this?