@tvad …could be that i got lucky…. A friend with a superb system circa 1983 or so…Infinity RS ( model down from IRS ), SOTA, Souther, Dynavector, CJ Premier… also a renowned music teacher in Mid Ohio..treated me to Mahler preconcert lecture / symphony in Cleveland …
Part of the lecture ( i may have inhaled ) focused on the selection of material for the death blows…. Leather over wood with a massive wood mallet ( think sledgehammer )
Yes, I've heard that piece performed by the LA Phil. If I hear it again live, I'll pay attention to the mallet. Definitely a learning to listen moment. I don't recall anything that specific in our pre-concert lectures.
LA Phil's principal tympanist, Joseph Prereira makes his own natural skin tympani heads, and his own mallets...several dozen mallets on his rack every performance. I'm sure the natural skin heads and custom mallets sound different than standard plastic heads and off-the-shelf mallets, but I've never heard a comparison. I also suspect sitting closer than 1st row balcony might be necessary to discern any difference.