I just got mine. Comfort is WAY better! I wear glasses, and the pleather just mashed the temple pieces into my head. As for the sound, I haven't A/B'ed them, but I did just put the pads on and give a quick listen. Bass seems a bit looser, but basically fine.
mrarroyo and anyone else - what did you do with the plastic ovals with the 4 pegs sticking out? I just assumed they were needed for the beyers, and didn't use them. I just replaced the old pads with the beyer pads, and stuffed the foam ring under the earpads. I guess one could stuff the plastic rings under the lip, and then stretch the lip over the earpiece, but what would that gain?