Good question, I did, but memories have faded (I don't even have time to look up my own previous posts on that, but I might have mentioned something, please check).
IIRC the D9200 wooden cups were less resonant in the mids (also shown in measurements). My experience so far with various woods for cups is contrary to mainstream: IME lighter woods but with good structure sound better (more musical, more lively) than heavier woods. Walnut is pretty good, though.
I might want to actually try that again, I got interested myself, since funnily enough, the D9200 sounds better with the D7200 cables and vice versa.
Time to check the cups, too.
I also want to measure them in all combinations, including the stock and other ear pads.
Right now I am very busy with work and end of year stuff, but when I find a quiet 3 hours to do this, I will do it, during one of the nights, probably, maybe this year
.
[ In the end, I will likely keep only one closed headphone, so two of my fine-tuned D9200, D7200, TH900 need to go, together with other stuff I don't use nowadays because office is at home. Maybe this test will help me figure out which.]