After using the phone for about a week... I can say the battery life on the Note 5 is slightly better than the iPhone 6 Plus in my usage, mainly using the Note 5 as a camera, playing Clash of Clans, watching a few YouTube videos, Instagram, Snapchat, and quick web search. It last me from unplugging the phone around 9pm at night and plug it in around 7 or 8pm the next day.
If I was to do the similar task on the iPhone 6 Plus, I would probably have to plug it in around 5 or 6pm. I normally plug the phone in when there's around 25% battery life.
Overall, the experience with the Note 5 so far is good. Just hating on the bloatware that AT&T puts on the phone, though it can be hidden/disabled via Debloater software (on xda) so it won't show up and improve performance slightly... If there's an option to root and 'freeze' the apps, it would probably be a lot better.
Anyone tried Samsung Pay? I signed up for beta and was approved but haven't had a chance to use it yet lol