I have the S7 and the iPhone SE. I had the 6 and 6S+ (+ is too big, bigger than a note)
First off, the S7 is amazing. Killer camera, fast, feels amazing in the hand, like a fine piece of jewelry.
Feels like its worth $700. Widgets are awesome. (real widgets)
Has fast charge, water resist, SD card... I personally Love Touchwiz, has lots of great features.
I simply can't stay on One platform. iOS apps just have a polish that Android will never have because they have to support the OS all the way back to 2.3 which probably still has 30% of the market.
Android apps have to be "dumbed down" to be able to run on the lowest common denominator.
Starbucks app is a good example. it's bare bones and clumsy compared to the iOS version.
When I walk into Starbucks, the apple wallet automatically brings the Starbucks app up on the lock screen. Soon as I light the phone up, I just swipe and a bar code pops up. Not even close on Android.
And comically, most google apps run better on iOS than they do android.
I also love Apple Notes app. it syncs to my iMac via iCloud and I can't find anything else the does it so perfectly. I also miss airplay to my apple TV. Haven't tried a Chromcast yet, not sure if that works like the apple TV.
On the other side. Samsung has this killer program you can DL from samsung web site called SideSync.
it works on Mac and Windows and it's pretty dam awesome.
You can do everything you can do on the phone, on your computer monitor instead, including texting etc.
The iPhone camera and the S7 camera take two completely different photos.
The iPhone is very color accurate, but also a little washed out looking sometimes.
The iPhone also has a much narrower area of focus.
The S7 takes very vibrant, over saturated, but very sharp photos and has a much large field of focus.
Honestly, both phones are awesome by themselves. Neither are a bad choice, specially if you can like BOTH operating systems instead of hating one or the other. (dumbest thing ever)
Anyone could be happy with either. I have to have both to be happy.
I keep an extra line so I can carry two phones or drop my main number in whichever I want that day or week.
Some days, I carry both. Some days I leave one of them at home.
Sometimes I throw my sim in a Windows Phone and leave the others at home.
I just like ALL phones and Phone Operating systems too much to be tied to Just One.