For those of you who do not want to read the entire article, but would like to read the "conclusion", check it out below:
It's not easy to tell which device wins this contest, as both the iPhone 6s Plus and Galaxy S7 dominate a couple of categories. The iPhone's strengths are in situations with ample light, particularly with the sun as a source; Apple manages to capture photos with more natural colors and less artificial sharpening. This is especially evident in shots with lots of minute detail, or in macros.
The Galaxy S7, on the other hand, performs well in lower light, owing to a larger sensor and wider aperture. That said, the device doesn't outright dominate, as photos taken in dim situations tend to emerge warmer and less lifelike.
The takeaway, as we often say at the end of these comparisons, is that both the iPhone 6s Plus and Galaxy S7 pack extraordinarily capable smartphone cameras. The same can be said for the year-old iPhone 6 Plus and Galaxy S6. Even the iPhone 5s pulls out some nice photos.
Still, there can be only one. And in this shootout, under these conditions, with this hardware and software, to our eyes the iPhone 6s Plus came out on top.
Source:
http://www.imore.com/best-camera-iphone-6s-samsung-galaxy-s7