I enjoyed your work on this
@pma , oddly I did the same thing recently
as you can see here.
It's clear to me on my system that witch2 is a bit more open and natural sounding than witch1, though both are very muffled sounding. I used an Audio Precision analyzer to do my amp test recordings and I think you may find them easier to make subjective and objective (DeltaWave) comparisons with. The amps involved are the Benchmark AHB2 and Hypex NC400.
My opinion: it's very likely that the majority of those who think there's no sonic differences between well designed amplifiers simply don't have the necessary tools to make such a judgment. I'm not talking about golden ears, I'm talking about high resolution, directivity controlled loudspeakers in a good listening environment. Until recently I didn't appreciate horn loaded loudspeakers. Done right they are vastly better than anything I've experienced before and gave me the ability to immediately hear the subtle, but real improvement of witch2.
God bless you and your precious family - Langston