The play store is broken and security is 100% a huge issue. On the hardware side, their biometrics are just junk compared to Apple.
Security isn't only an issue for Android. People are looking for vulnerabilities for every OS mobile or not and they are finding them as well.
Superior screens (IZGO LCD lasts 10x as long as AMOLED, has no burn in, and uses less power).
This in my opinion is not a clear win because while burn in exists for AMOLED screens someone would have to disable the auto shutoff of the screen and have a static image for a very long time on the screen. That is not a typical usage case for the average user and even under normal usage the person would likely upgrade the device before burn-in was noticeable.
It's kind of complicated comparing hardware to hardware because there are quite a few makers of phones who use the Android OS... while only one manufacturer uses iOS.
One would have to make a chart of all the different phone manufacturers to quantify hardware wins imo.
As for superior build... well some materials feel better than others however
http://oneofthenine.com/
build quality isn't clear cut. All phones will bend with enough pressure put on them but afaik the iphone 6 plus is the only phone that bends mostly in the same place and if you believe the owners they weren't abused.
I put a case on my smartphone in anyways and do not carry anywhere except the front pocket of loose pants if necessary... it's in a jacket pocket during colder months.
I bet the revision 2 of the iphone 6 plus has better reinforcement around the volume switch area.
.....