So, I hold two pairs: one a couple of months ago from Philips and the other from Gibson. Both are X2/27s. Visual inspection, quality of the packaging, both seem the similar. The only difference appears in the label in the bottom of the box. At this time, I am not taking off any earpads. Also, I am not listening to the second pair as they are a present and want them listened to for the first time by the giftee. I will check the sound out on Christmas day and give them a closer check and comparison. For now, my take is the whole Woox audio division is still intact and owned by Gibson (the video will follow).They are still manufactured with the same parts (drivers, foam pads, shell, leather wrap, etc), same specs, same tolerances, similar processes (I suspect that Woox/Philips was getting some complaints about the earpads loosening so they added the glue), and same manufacturing company and location in China. Having been part of changes like these, including movement of manufacturing lines, there are sometimes minor changes-even cost reductions, improvements, or issues that can occur. I suspect this is the case here but I am pretty sure it is the same headphone spec with same parts. I don't think Gibson bought Woox to specifically devalue or cost reduce the Fidelio line, which happens to be the premium labeling of the brand. In fact, while Gibson designs and builds many lines of guitars, their Limited Edition line is coveted by top musicians. The Les Paul is a Gibson. I like to think that Fidelio will occupy the same space in the headphone line. Hopefully, these issues are process engineered changes and they will not be an issue or will be sorted out. I will know more on the second of the pair on the 25th...