If you look at every flagship headphone that Sony has designed, you'll notice that they all share a pretty big deficiency in actual measured bass performance. The XB line is their super bassy series, I think this is probably going to be more in line with their flagships; just tweaked for a reasonable amount of bass.
my point being is they are using the classic "beats ploy" partnering with a big name in music, BUZZ WORDS EVERY WHICH WAY, and emphasizing bass and treble in the description. Oh sony, please don't go down this path. I know this is just speculation....but Denon is doing the same thing.