This is interesting when compared with these results which compare an i1Pro2 to a higher grade spectro:
I remember the seeing the results on the Chromapure in the past, and yes, when I had an i1 Pro2, the tests I did produced very similar results. Note that the Chromapure results are using dE 94.
But my post above was not about the i1 Pro2. At the time there was a lot of "chatter" on other forums and by some on YouTube calling into question the effectiveness of using an EDR when a Spectro was not available. The comparison measurements I tried to show were comparing the factory Generic CMF calibration of the i1 Display Pro 3 vs the WRGB OLED EDR vs a 4.5nm Jeti to try and highlight the significant advantage of using the EDR in place Generic CMF, and show that it was not useless and would not make things much worse, as some were claiming.
The EDR has minimal impact on how the i1 Display Pro will measure white (as expected)
, but significantly improves how it measures the primary and secondary colours. It is not perfect by any means, but there is a definite improvement (without the EDR, the i1D3 records Negative Z values for wide gamut red on WOLED, for example)
For what it's worth, when I still had the i1 Pro2 and compared it to the Jeti, primary and secondary colours were very close in xyY. Much closer than when using the EDR. But white was off, with a dE 2000 of 2.36 IIRC. Luminance readings for white were very, very close, but xy coordinates were definitely off.
I still have all the data somewhere but I am not about to go digging for it now.
, provided you understand that the i1 Pro2 will provide a less than perfect measurement for white on many displays and are willing to do something accommodate or overcome that, then using the i1 Pro2 to perform a probe match is still better than using the EDR. But there is nothing fundamentally wrong with using the EDR if that is all you have at your disposal (contrary to what was being claimed at the time and is why I provided the measurements)
Alternate WPs is not a topic that I will discuss as it is entirely subjective and varies from person to person.