You are talking about two different levels of calibration...
Displays that have no user LUT capability, and rely one user manual controls will never be as accurate as those with use re-calibration capability, with LUTs.
And yes, that most definitely includes Sony!
We have had a lot of discussions with Sony, and for some reason that we don't understand they just will not allow external calibration access to their internal LUTs - which I suspect means they do not have calibration technology that they are willing to share, as it would then show the poor level of their internal calibration.
This is an example of a Sony OLED RGB Separation - a good indication of the accuracy of the calibration - and it's not good:
As for you calibrator saying he doesn't use LUTs as the Spectro. he uses is so accurate it makes LUTs unnecessary - that's just bollox!
A good spectro can't make-up for not having the accuracy of a good 3D LUT!
What it can do is improve the accuracy of the 3D LUT, over the potential inaccuracy of a tristim. probe...
Sorry to say you have been spun a pack of lies there...
Mob Boss at Light Illusion