The Samsung Note 4 as a camera is much the same as the Samsung S5. It's just got a wee bit faster focus; a wee brighter and much better screen (with corresponding reduction in battery life; personally I'll take the battery life of the S5; the Note 4's short battery life is unacceptable! Samsung please fix it with a firmware update). Unless you love phablets, I can't recommend the Note 4; just get an S5 if you want a Samsung cameraphone. The iPhone 5S, 6, 6s, Nokia 1020 are much better and have much better battery consumption if you want a better camera and/or a better user experience.
21st century cameras are social and on the internet and awesome-ized by software and sensors