Throwing hardware at a poorly optomised is Valdivia mistake.
My three week old SGS 7 edge froze hard yesterday and had to be rebooted. CNN app crashes every time I use it, I've sent several reports.
EVERY.SINGLE.TIME.
And there is stutter when scrolling through pages. Especially heavy Web pages.
I've never had my "inferior" specced iPhone 6s Plus freeze, it's only rebooted as part of an upgrade.
As far as battery life, it gets a day in WiFi but less out and about. My iPhone 6s Plus consistently gets me a full day. I charge overnight out of habit.
As far as security measures, I want them. Yes, I'd love to have themes, but for me, it's lower on the things I value than, say, the trouble free experience I get with my iPhones year over year.