Externally, the iPhone 6s and 6s Plus do not look that different from their immediate predecessors, save for a bit of added bulk for the sake of added strength. Inside, however, Apple's new gen iPhones have seen a slight evolution, especially when it came to the camera. For the first time since the iPhone 4s in 2011, Apple upgrade the iSight camera, from 8 megapixels to 12, allowing for native 4K video recording. But how better does the iPhone 6s' camera fare against the competition or even against the iPhone 6s. As DxOMark found out, not that much.