These 2 are a comparison of the 4s and S5. Both taken from the exact same position with the same low lighting and then cropped. I took photos on different settings and picked the best on the S5. ALL AUTO was what created the best imaging in low light on this S5. There isn't any real need to use different settings on the iPhone, so i just used the 1st photo.
These were the outcome. I seriously tried to be a s fair as possible with this. Mind you, this iPhone is 2 generations behind.
You can see one blends the lines and color together to make the image smoother, image is brighter but sacrifices detail and true real world color.
The other holds more detail, harder edges, and truer real world color, but creates a more grainy image.
Look at the power receptacle, phone cord receptacle, cabinet edging, top of dog treat bowl (blue scarf and writing on bowl).