Before I move onto other things—although music mastering & quality is something I might like to return to periodically—here’s a few more musical waveforms for comparison, with comments.
KATE BUSH—RUNNING UP THAT HILL (1985)
The top image is the original 1985 mastering. It has a dynamic range of 11dB. Below it is the 1997 remastering (not by Kate herself)—the dynamic range (DR) is 7dB.
You’ll note on the top one, Kate herself does make use of the full soundscape and sometimes clips the very peaks of the sound for effect (which is perfectly fine & valid!). On the ’97, there is lot of peak-clipping (the tops of the waveforms being cut off) and compression, which results in a loss of 4dB of DR. Kate’s own 2018 remaster of Hounds of Love, which I’ve yet to hear, has the same dynamic range as the 1985 release.