I know the Hero 4 shoots in true 4k, but I'm wondering how the video quality matches up between the latest and greatest gopro and video from the Iphone 6 (plus) using MoviePro or a similar app to enable higher bitrate video shooting.

I've seen comparisons w/ the iphone's video and some of the older gopros but nothing comparing them with the Hero 4. Anyone know of any or have any experience with comparing the two?