TPMS sensor pressures...which device reading is more accurate?

I was swapping sensor positions with my Autel TS508 yesterday and I'm finally getting around to posting this question. What is the most accurate reading? The first set of numbers shows what the Autel reads compared to the truck and ScanGauge 3 readings. the second set is after a 20 mile drive this morning showing my head unit, the truck, and the SG3. I'm not concerned with the head unit reading since I rarely look at it. Why would the SG3 read about 3 PSI higher? as far as I know, the SG3 does not have any adjustments for the TPMS.

 

Autel is who I would trust. The truck will round the data off. Scangauge has some weird math they use from everything I have seen and prob rounding issues as well.

Have you manually checked the the tire psi with a digital gauge to compare.

My assumption is the Autel is most accurate

 

With those measurements, I wouldnt worry. All within an acceptable range