The Kinect 2 is supposed to have superior skeleton tracking, so I tested it against the Kinect 1 in a single-camera setup of iPi Studio.
Conclusion: a single camera is always going to have trouble when the actor doesn’t face front, so both tests show obvious glitches. However the Kinect 2 does seem to capture more subtle movements.
Kinect 1 is purple, Kinect 2 is green:
Download FBX files.