I had a calibrated temp probe controller that i used to control heaters before reef pi, i tested the ds18b20 DROK probes against it and my 4 ds18b20 were all within .2 degrees of the calibrated probe, and all within .1 degrees of each other.
If you have doubts. Make an ice water bath, see how close each of them read to 32f.
That's interesting, I did it this morning, and it seems to work as intended. Confirmed my suspension that one of my probes wasn't as sensitive as the other and took longer to get down to the known temp and still wasn't as on, but still within <0.5F
Temp1 seems to acclimate faster and is more "accurate" than two. Might have to grab 2 more probes and run two of the best and others as back up.
