You read it wrong. Unlike some of you who pluck things from the air and say they are facts, all I did was to convey what was said by this article.
https://translate.google.com/translate?hl=en&sl=ru&u=https://www.mobile-review.com/review/apple-iphone-x-fl.shtml&prev=search
And the article didnt say it is off-the-shelf S6 panel. And I never said or implied that either. The article said the panel has the same capabilities as the s6 generation panel. IPX screen may have been customized and manufactured today but the tech of the OLED is equivalent to S6 generation.
The OLED used in s8/note 8 is better than IPX in these aspects (as said in the article)
1. Higher resolution (8.5 mil subpixels against 5.5mil on the IPX)
2. Higher peak brightness 1000-1200 (IPX has a max around 700). This is about the tech of each subpixel and its ability to light-up brighter (i.e. better quality oled).
3. Adaptive screen brightness with dual front/back light sensors.
What was said in the article IPX screen does not have the adaptive brightness mode hardware chip (i.e. cannot make full use of amoled potential). Displaymate said that IPX screen has the highest full screen brightness at 700. Indoor/normal use, this factor is irrelevant.
In bright sunlight, IPX will ramp up the full screen brightness to 700 nits but that's gonna suck battery. This is where the chip-based adaptive mode on the S8/N8 comes in. The screen can selectively brighten up (to 1000-1200 nits) certain portions of the screen based on the image/intensity of sunlight to give a better dynamic contrast of the image. Instead of wasting lots of battery to light up all the pixels to brighten the screen like IPX, these newer S8/N8 generation screens can save battery as well as have a better legibility in intense sunlight.
4. Always-on-display native chip-based support. Ability to only turn off/on selected portion of screen. Software-based implementation is not going to be efficient.
5. Much wider color gamut (20% wider than IPX).
6. Better viewing angle and less color shift.