AudioNerd42was wondering the same thing, I looked at the specfications on the sennheiser site and they look identical besides visually.
*Edit*: Since this is based off the PC 373D I decided to find some comparisons, the most noteable difference is the microphone. The GAME ONE has a better microphone compared to the PC 373D.
Source:
imSubActually looking at the specs and from what Dimitri says in the video the microphone is the same and the usb sound card is what causes the difference, so they should both be the exact same (execpt visually) since this doesn't include the usb.