Got it, let him know. Correction should be made soon.There is an error in the 580 and 650 pdf's.
The credits under the pad measurements went to:
Red BS 650 New Pads vs Green BS 650 Old Pads - Credit to Psalmanazar on SBAF
Psalmanazar, however, had nothing to do with this and is not the creator of this plot. I am.. solderdude on DIYAH
Perhaps you could forward this info to the author ?
I also measured new vs old pads.
And nice write up! Didn't see that till you pointed it out. Here were our measurements personally with the EARS:

I was debating about posting at all since the EARS above 3k was super funky.
And then the pads again, fresh ones. Matte left, glossy right:


One thing me and the friend noticed was how much harder it was to apply the new pads to the 580 we used to measure them on vs the older one.
Overall just doing a test between the matte and glossy on my system, it sounds so relatively close between each I would struggle personally to pick out the two in blind a/b test myself.