Let me throw in my 2 cents.
I swapped lots of amps in years, and honestly NO, NOT ALL AMPS SOUNDS THE SAME!
Always addicted with AB class, class D was never in my mind, even for subs duty.
But tryed some full range class D amps recently, including top line like Leviathan III, but only for wf and sub duty. And honestly is difficult to ear differences between high quality class AB and high quality class D amps in the range below 250hz.
Never had chances to try them in mid-high.
Of course you can't compare bargain class D with premium AB or bargain class AB with premium class D. Engineering and design is essential.
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