Am not an expert but... that doesn't show loudness difference to me. That shows dynamic range difference to me (even the Youtube description says they actually normalized the volume). I can hear the difference between the two version and how distorted the retail version is compared to the more clean sound of the GH3 version but it's not simply up to loudness.
Honestly maybe loudness war is a wrong term? Should be dynamic range war or compression war.
Honestly maybe loudness war is a wrong term? Should be dynamic range war or compression war.