My two penneth worth....
I moved from an iPhone 6s Plus to the S7 Edge although I still have the iPhone just in case I get that urge to go back. I will admit I am terrible for buying the latest phones and generally end up going back to the iPhone after having a brief few weeks with Samsung's or whoever's latest iteration.
However, this time feels different. I have not noticed any lag whatsoever with the S7 Edge, it has not locked up, become unresponsive and it certainly runs flawlessly in my experience so far.
I don't care too much for benchmarks on a phone, for me its about real world performance, yes the S7 may still have ram management issues, but in the grand scheme of things, if a game has to reload then so be it, it will take a few more seconds its hardly a showstopper. I Myself have not noticed any of these issues so far, although I don't load or play lots of games on my phones generally.
Offset that small negative against having a 5.5" beautiful screen in a handset that is not much bigger than the standard iPhone 6. The iPhone 6s plus was and is unwieldly at times. Add to that, VR capability (Which I am very impressed with), MicroSD slot, Superb low light camera, waterproofing and overall this is a package that is very difficult to beat.
I love my iPhone 6s Plus, but I am honestly struggling for reasons to go back to it full time and to move the S7 Edge on. The main reasons I could see me going back would have been mainly due to the 5.5" screen and the superb battery life of the iPhone 6s Plus, but this time Samsung have truly arrived at the party and personally I think have trumped Apple's best device and by some margin.
The battery life on the S7 Edge is almost identical to my iPhone 6s Plus. I also had the S6 Edge and whilst it was a lovely device I found myself tethered to a power socket as I found the battery life truly awful.
I really am impressed with what Samsung have done with this device, I think it will take some beating and try as I might, I just can't think of any standout reasons to ditch it and go back to the IP6s Plus.
If there is one thing I am unsure of is comparison of sound quality from the headphone socket. Now I do use Westone W40 IEM and know that these deliver some fantastic sound, but I have not done a comparison between the 2 handsets as yet as if i'm totally honest, I didn't think I would keep the S7 long enough to load my music onto it
How wrong I might be....