When I go to my parents house for family get togethers monthly, I'm surrounded by iPhone 5 and 6. All of them hug the wall at some point so idk about battery life being so much better. Maybe on the 6+ because it's a huge phone that's a Note 4 class phone, therefore it's not fair to compare to s6/edge. Another thing I've noticed with each family event more and more of the iPhone's become cracked with or without a case every month another relatives ip6 or ip5 has a cracked screen. Lastly, as far as software, to each it's own. I've played around with ios it is fast and optimized. Android will never be as smooth simply because Android is on so many platforms with different skins and options etc...
Some of the problems many users who favor iPhone are complaining about are isolated to individual devices that are defective or has a os hangup. Is there lag on s6/edge? Well, when I use chrome for several minutes straight, since I've changed settings to let it use 500mb cache it sometime will have to reload my homescreen for 3-4sec after I close chrome. Sometimes the keyboard will stutter if I'm typing while listening to tune in radio for an hour or more straight. Does it get hot? When I'm outside in the sun with terrible reception, yes a little. But I've had this issue with every phone I've ever had, this s6 edge happens to complete all the tasks faster. Since upgrading to 5.1.1 the battery is lasting longer and I havn't had any heat whatsoever, even with poor signal.
I think both the s6 and ip6 are top quality phones as well as g4 and m9. Hell, Sony makes a great phone, as well as other manufacturers. Get what you like and enjoy it.
Posted on my Galaxy S6 edge
(S is for Super) via the Android Central App