The Samsung Galaxies have notoriously inaccurate colours, they are really over saturated to make the screen look more vivid. N4's colours are actually pretty accurate, for a cell phone, when I measured them with a calibration tool.
People are just used to unrealistic, over saturated, crap I guess. iPhone 5 is pretty damn nice however: good gamut and balance. But, the Samsung amoled is just cheesy crap.
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