Yeah it was obvious to me that the X had the brightest screen in that video.
I trust displaymate, if Raymond says the screens on the X are better, then they are better.
At the end of the day, who really cares?
Note 8, S8, iPhone X all have incredible screens.
I really don't think the S9 or Note 9 screens are necessarily guaranteed to eclipse the Apple calibrated Samsung screen either, Apple obviously take calibration to extreme levels.
That said, I don't care, I've always been attracted to Samsung's take on what an amoled screen should look like, I consume content, I don't require perfect colour spaces, I'm not creating content that needs to meet near perfect criteria.
Would I like it to match or exceed the X's brightness?
Hell yeah.
Apart from that and a higher doing for VR maybe, there's nothing more I need from my screen.
Enjoy these devices people, we are so lucky to have such a wide choice of amazing devices.