Why not just listen and judge for yourself.
Because there is no reason to believe it would be anything other than a waste of time.
Right, but as a listener, if you can't hear it it does matter...
That's kind of the point...
If the various test results demonstrate noise and distortion at levels you have no chance of hearing, and otherwise competent behavior, what is it you expect to be different from one to another?
Do you believe there is magic woo hidden along with the frequency, amplitude and phase that we haven't found yet?
You are basically thrashing at this point. If you can't provide more than anecdote, maybe that's enough...