Kinect v2 depth resolution

I've been searching for a long time now the specs of the Kinect v2 such as said here for the Kinect v1. I'm especially interested in the depth resolution of the Kinect v2.

I'm also quite surprised that such data is so hard to find with Kinect-like sensors (I found the RealSense depth accuracy in a forum for example). Why is the resolution so hard to find ?

NB : by resolution I mean the smallest variation of the measurand that the captor can measure

So if anyone knows where I can find these specs for the Kinect v2, thank you in advance !