I have encountered a subtle issue when calibrating my Eizo CG21 with ColorNavigator. The software supports both my X-Rite DTP94 (Monaco Optix XR) and Colormunki Photo, so I can use both to calibrate/profile with the same target settings.
I find that the Colormunki gives noticeably cooler results than the DTP94, for the same target color temperature. I get a pretty close match when I select 6000K (DTP94) versus 5700K (Colormunki).
When I validate the DTP94 6000K profile with the DTP94 I get an average error of 0.7 (max 2.7) dE, and 1.4 (max 2.8) dE when the Colormunki is used. Conversely, validating the Colormunki 5700K profile with itself gives 0.7 (max 2.1) dE and using the DTP94 I get 1.6 (max 2.9) dE. The maximum values are always for a blue cast on the black patch - the biggest weakness of this monitor. For cross-validation results, the white patch is a close second due to the white balance shift.
Obviously, the two devices use different technology (colorimeter vs spectrophotometer), but I was expecting at least the color temperature readings to be close to one another. Can anyone shed any light on why I’m seeing such a difference? Also, which of the two is more accurate for my monitor? I have the DTP94 for 6 years now, and the Colormunki for 3 years.