Ok, after 2 hours of soak time, this is what I got:
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We have a degradation of 5 to 6 dB depending on channel. Note that the above is highly zoomed in covering only 10 dB of range.
I then re-rand the FFT in the dashboard:
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We have very good matching of the distortion order/level. Second and third harmonic are right on the money.
The noise level is lower in mine but that is affected by FFT parameters.
Looking at dashboard sinad, I see:
View attachment 41691
This is versus 110 in L7's tests. This is within what I consider acceptable given different analyzers, units, etc.
In summary, large amount of difference is due to thermal conditions, not any hand selection of a unit/components.