i agree very much with ralph/@atmasphere
class d is a class of technology, even within it, there are substantial technological variants, not to mention myriad of ways to implement
but folks keep at the old saw... class d is like this, class d is like that
it is all in the details folks! would we say, well moving coil cartridges have this sound? it's silly, in reality they run high and low, all over the spectra, it is a technological means to do something, how it is designed specifically, how it is implemented, drives the sonic result