stopped by an apple partner store, 3 models having GVC panels, and all their GVC are not the same. The PM brightness is least intense, with mild green tint at the 30% bottom half when doing the inward tilt, but perfect uniformity, warm color temps when tilting left/right and bottoms up.
The Air green tint is the worse, even a slight inward move, 80% of the screen looks green, but it has the brightest intensity.
The base has the least green tint, just a smudge 10% bottom. It has best contrasty colors and pop-out grey scale. If i didnt check the IOReg panel, i would have thought it was a G9N.
Done with 100% brightness, auto brightness off, true tone off, light mode.