Looking at them.... S7 has the better camera, clearly. And before you get your hockles up, I am, by no stretch of the imagination, a Samsung fanboy. I've owned several LG phones... Nexus 5, G3.. my wife is on her third (N5, G3 and her current G4). I have zero desire to own a S7 (or any current Samsung phone for that matter), but I am debating either the S7 or the G5 to replace my wife's G4. So I am putting my own personal tastes aside here and looking at things with an open mind, trying to pick the phone that would best suit what SHE wants.
And looking at these pictures and going off what I saw with the G4 and 6P... I am leaning towards getting her the S7. The G5 might have that trick wide angle camera, but when you pop over to the other 'narrow' sensor, the S7 will just do a better, more consistent job across all conditions.
Both do great in ideal conditions, but the smaller sensor on the G5 starts to get noisy when things start to get darker. Look at the shot with the three towers. The shadowed side of the rightmost tower, the G5 gets muddy and noisy where the S7 does a lot better in maintaining detail and much less noise. The wine corks sort of show the same behavior. The G5 has to process things a lot more to reduce the noise and you start to get that oil painting effect.
Granted, this is exactly what is expected once I heard the G5 was going to use the same sensor that they slapped in the G4 and V10. The G5 might have more pixels, but they can't cheat physics. I just got back from vacation and took a TON of pictures with my wife's G4 and my Nexus 6P. In good lighting, both the G4 and 6P took pictures that were close enough to not make any appreciable difference. But as the environment got darker, so did the quality gap between the 6P's shots and the G4.
Damn you LG!! I mean, had they followed Samsung and Google and slapped a larger main camera sensor in there and paired that with the wide angle shooter.... they would have had one hell of a camera set up on this thing. But they pretty much stood pat... and I think that was a huge mistake. I really wanted to see the G5's camera perform better... but from what I see in those comparisons, it's basically the G4 with a second wide-angle camera... and that wide angle camera doesn't add enough value to overcome the gap between its main camera and the S7's.