So when I first got my 12PM I thought it was yellow. Disabling true tone definitely helped, but side by side with my 11PM it still looked yellow. Today though, I compared again and it looks pretty close, the 12PM definitely not quite as bright and maybe a smidge dingy. Also I confirmed my 12PM does have the green flickering on the pure black video test.
I wanted to put some data to this question.
Using sRGB target, D65:
My 11PM measured 6750k with an avg ΔE 1.1, max ΔE 2
View attachment 1670410
My 12PM measured 6520k with an avg ΔE 1, max ΔE 1.9. We can see the grays on the 12PM have greater ΔE, especially the dark grays, compared with the 11PM ΔE around the same color bands. This lines up with the slight tinge, especially when dark. So no, you aern't crazy if you see this. But overall, the 12PM display maybe appears slightly more even in regards to ΔE across the board compared to 11PM?
View attachment 1670411
So this reflects the slightly warmer tone the 12PM has for me, but I found both phones to have surprisingly tight calibration from the factory. Don't forget to disable night-shift as I forgot the first time and it also made a difference.