I have compared these amps online and have come to some startling conclusions. Specifically, it is clear that one is superior to all the others, and that one is the one I own, though I have not heard the others. Still, I am resolute that the best is the one I own, and the others, while finely reviewed by others, does not achieve the same: slam, timber, air, authority, mid-range truth, sound-staging, presence, nuance, verve, or insegreviousness.
Best,