Throwing in my two cents here, as maybe a reminder how subjective this thing can be: while I definitely agree these pads increase soundstage, and they are… theoretically comfortable to me insofar as they feel nice in my hands, and there’s less material touching my ear when I wear them, but they’re very much not comfortable over longer periods of wear than the A pads for me. They are a lot fatter so if you had any issue with the clamp prior to pad swapping, your head is going to feel like it’s being vice-gripped. Or such unfortunately was the case for me anyway.
Treble was a little weird also.
I ultimately prefer the A pads the most. Cable swapping and testing synergies with different sources is my preferred route for toying with the 1990 sound/experience.