I looked at the data. A lot of those are showing yellow, even though the reading is only off by 0.3. Two freshly calibrated Rockwell testers that have been calibrated to two different standard bars, both of which standard bars traceable to the national standard, are only guaranteed to agree with one another by ±1.0 point. So a difference of "0.3" or even "0.5" is actually not a difference. I would be interested in the pedigree of the tester being used for that. The one I used was maintained in calibration using standards traceable to the national standard. Those standards are expensive.