IMHO, the TRUE is flawed. Both the Ultra 120 and the TRUE were warped, the TRUE was very badly warped and effected the temps by 5c. I inspected it and found it to be very much bowed. I had to flatten it with a machinest stone first, then 320g emery and spent a great deal of time on it.
I guess my point is, what if the tested TRUE was shipped flat as it was ment to be, or it was warped. What if the competing HS was warped lie the TRUE because there popularity increased and the production became flawed like the TRUE.
So, IMHO, any results would be skewed regardless. The only reasonable factor would be to test with the TRUE unlapped and lapped to focus on the variant. And as stated with the various types of fans in each surface condition.