I have to disagree with you on that one. The 2000 master has a dull, digital-looking white balance. What you call as “too yellow” on the remaster, I counter with “too pink/magenta” on the Blu-ray.
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But in the case of Amadeus, supervised by Paul Zaentz who really cared to make this version exist again, I think they nailed it.
As I said: In terms of colors, I am of completely different opinion. I am just working on nearing the 4k colors to something neutral, in direction to my HD master. Too much red/pink/magenta? No. The opposite, and well seen in your example. Sorry, but here I have to stay with my sight.
Any appearance of superior sharpness of the 2000 master is a result of artificial sharpening. Just look at the slight halo around the mother-in-law’s headdress compared to the remaster. Also note the blown out contrast on the highlights:
https://caps-a-holic.com/c.php?a=1&x=424&y=208&d1=4791&d2=19001&s1=44634&s2=225179&l=0&i=2&go=1
I am also of complete different opinion here. HD Colors are by far better. The typical 4k greenish-brownish look really hurts my eyes. The HD highlights are a bit too much, but in this you cannot compare SDR and HDR. The highlights in the 4k master are not overdone, so that more details kept alive, that’s right, but therefore you have much too low contrast in the picture. You often have to pay this price (when you don’t overdo). In HDR you can keep every highlight, that’s one of the advantages.
There is a certain amount of haloing in the HD master, that’s right. If this is done by sharpening it was a very “cheap” sharpening, but when the master is from 2000 it is throughout possible.