http://www.phonearena.com/reviews/Samsung-Galaxy-Note-4-vs-Apple-iPhone-6-Plus_id3815/page/3
"Turning to image quality, it's fair to say that you can expect excellent results from both phones during the day. In fact, it's really hard to put either in the lead as they're so close in terms of reproducing the overall composition in front of them with all its caveats. But caveats they have. Indeed, while both phones offer dynamic scenes, they boost colors slightly the iPhone 6 Plus churns out snaps that are slightly warmer than in reality, while the Note 4 does the opposite, and captures scenes that are a bit colder than ideal. That said, both deviate from reality so slightly that it's actually a question of taste more than anything else. Thankfully,
noise is also essentially negligible with both. The only area of no contest is details the Note 4's larger photos offer visibly more fine information if you zoom in to 100%.
Indoors, the two devices again offer great results, but we found that the
iPhone 6 Plus produces slightly brighter shots. On the other hand, however, color reproduction, while excellent on the whole, is a bit lacking in comparison with the Note 4, as hues look a bit faded and washed out when put next to shots from the Samsung phablet. Again, do keep in mind that we're talking about very small deviations and inadequacies here.
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