Probably less likely that New Version HD560s would have troublesome peak in 7500Hz area and also less likely at 4500Hz. Following a couple of converted measurements I did on Old Version (first pic) and New Version (second pic), and note the frequency response is the faded line in the background as the bold highlighted line is after EQ, and the Target Curve there is Harman 2018:
Old Version:
View attachment 438420
New Version:
View attachment 438421
I suppose the peaks can still be there for some people up at 8000Hz, but I think Sennheiser have tried to address the treble peaks up there, ie flattened them out a bit. Old Version is definitely more peaky in my samples.
Note: these are not genuine GRAS rig measurements, but converted miniDSP EARS rig measurements (so "GRAS Style Measurements"), but for comparisons sake they are valid between Old Version & New Version.