Gave the XB600 & XB800 some ear time last night after over 24 hrs of break-in. The XB800 is definitely the better buy in terms of sound. It is a lot more open with smoother midrange. Bass is boomier. I feel the bass on the XB800 could be a bit more controlled. Is the XB600 bad? No, but the price increase from the Xb500 makes it harder to recommend.
The vocals on this tracks sounds great on the XB800. No, this girl in the video is NOT Sia. I listened to the CD, not the YT video.
Wanna give a comparison of the 800 vs the COP please?