Professional reviewers, of all stripes, are analysing the iPhone and Note 4 all over the web... and both phones are so close, they have to resort to pixel peeping to find where one excels and the other falls barely shy of the other.
These phones are close and they both have excellent cameras based on those reviews.
Hopefully, the concerns listed in this thread are truly a mechanical flaw with the Note 4. I just become upgrade eligible today, love taking photos, and the camera was a huge selling point on the phone.
I'm still trying to decide if I want a great camera with an unwieldy phone size.... or something that fits more comfortably in the pocket and hand but with a lesser camera.