Android has just as much white space as iOS does and battery life on Android phones usually surpasses that of iPhones, so that point isn't very valid. AnandTech also did an AMOLED efficiency analysis last year that found that when displaying pure white (with no other colors whatsoever) AMOLED was about 33% less efficient, but most of the time AMOLED display are more efficient.
Furthermore, they also stated that based on Samsung's past improvements in their AMOLED technology, by this year AMOLED displays should be just as efficient as LCD displays even in their worst case scenarios (pure white). So it's safe to assume that by the time the iPhone gets an OLED display power efficiency will have surpassed that of LCD displays even when displaying pure white.
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That's why I made it a point to say that I compared the same pictures, websites, videos, etc. on both displays to ensure that the colors on each weren't completely different. By "popping out" I didn't mean inaccurate, I meant more along the lines of things looking brighter, clearer, and more vibrant. More vibrant colors doesn't have necessarily mean more inaccurate colors. If the colors were inaccurate I definitely would've noticed as I used to own a Galaxy S4 that had a pretty inaccurate display. The display on the S7, however, was just as accurate as my iPhone's display.
Something that I also think is interesting is that that while color accuracy is important, I'd bet that most people would prefer a somewhat less accurate, highly saturated OLED display over an LCD display.My reasoning for this is based on when I owned the S4 as mentioned above. It had an inaccurate, highly saturated display, but when I would show friends family pictures/videos that I took on the S4 they would constantly were wowed by how the display looked. Granted, that was a few years ago, but it's something I thought was worth mentioning.
