I'm in the same struggle right now between the iPhone 6 and Note 5. My 14 days with the Note 5 is up this Saturday and I need to make a decision. So far I love having the stylus and the screen for videos is surprisingly immersive on a 5.7" screen.
What I really like about iOS is the "limited" features it has, it works without any issues. I don't have go into bunch of settings to remove this, and disable that. And the battery life on the iPhone 6 is surprisingly comparable, maybe even better than the Note. The Note 5 is a bit faster I think but that's if you manage the ram correctly. The battery life is really poor out of the box. Apps don't play well with each other sometimes. ie: using both the Samsung Gallery app and Google Photos sometimes are not synced together. The dates of the photos are different so when you sort it they don’t appear properly. My Google voice search(holding down home button) no longer works for me, photos for each individual app is stored in its own app folder so its hard to find it later on. There’s definitely a bigger learning curve to Android of which I don’t know if I can learn it. But, still deciding!