Actually you can adjust the saturation on flagship Samsung phones. There are 4 different screen modes on the s6 and note 5 where you can adjust the saturation to your liking. The basic mode gives about the same level of saturation as an iphone display. And the differences
Adaptive mode pushes the saturation to the limit.
Adaptive - The color saturation is maxed out. Looks good but it also looks unnatural.

Basic - This setting looks like the iPhone. Personally, it looks more natural.

With the basic mode activated, the screen is warmer. Whites are warmer and not pure white (shifted blue).
I would also like to ad that while I liked the screen of the S6 Edge + when I first saw it, next to the iPhone, there is a difference. I prefer the iPhone screen over the OLED one. Brightness is much better, it doesn't feel as "fake". The OLED screen is too blue. Being able to set the color temp. of the phone is a nice feature. I have it on Basic and it's much more pleasing than the blasted out color of Adaptive.
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