They actually mention in the link that the two 'had identical results'. I mean, wow, right? How stupid do they think people are?Someone at gsmarena copied something ?. Probably find it gets amended in the future.
As I have both the G4 and S6 Edge they definitely have different figures for battery stats. Audio is different too. In fact the phones couldn't be more different if you tried.
Here's the quote:
"As it turned out both Galaxy S6 and Galaxy S6 edge outed absolutely the same results in all of our tests – 3G calls, web browsing, video playback and stand-by endurance."