Hey all - there has been a lot of discussion about the realsense d415 and d435 over past weeks.
FWIW - based on a number of conversations with Intel - the d435 is not really shaping up as an ideal solution for skeletal tracking - its noise errors increase way to rapidly once your extend out past about a meter.
Tech support have provide the following PDF which helps to understand the technical differences between the two sensors - it is well worth the read. ALTHOUGH we dont have any current ability to tune the sensor itself when using nuitrack.
And for those that want to know more about post-processing with realsense