The YouTube videos above are wrong? Clearly, your opinion is just that. Youtubers, including some well-known, clearly disagrees with you.
Night Sight requires that you hold still for at least 5 seconds. No motion in the picture. It is not a mode that you can use routinely. But you know that, right? LOL
Take out Night Sight, Pixel 3 low light is good, but not really any better than other flagships, including XS.
And if you understand Smart HDR, then you know that is basically a shortened high speed version of Night Sight. It is just the matter of Apple massaging it for night pictures.
And during daylight, Pixel 3 is dark and gloomy due to extra heavy contrast applied. But you know all of this, right?
Real metric for me...is the overwhelming Youtube videos supporting what i am saying. And if you are into DxO, then yeah, that too.
Nice try though. (And sorry that your iPhone X is not living up to its promise...been there, done that....the XS camera is a much different animal.)