There aren't many people on here that can produce a meaningful test of one amplifier, much less several.
The overhead for such challenges is so large that it prohibits 99% of all enthusiasts from doing so. That 1% that has the ability to do so will either lack the knowledge to complete an adequate test, or will be limited in the scope that the test can cover at risk of confusing the other 99% who are interested in it.
Great effort by Chad, Loyd, Jim, etc. But I think even they will agree that it was a "challenge".