I have used both the phones in recent years.
I had a iphone 5s and at the same time I had a galaxy note 2.
1) iphone is easy to use then any galaxy phone
2) iphone have a better user interface then galaxy phones
3) iphones do not hang where as galaxy phones hang like for 10 times a day
4)iphone has a better battery life then galaxy phones.
So I just want to say that iphones are way better then any galaxy phone in every way. the thing is that iphones are a bit expensive then galaxy phone. this is because the company wants to keep there good reputation.
If iphones were cheap, evey other person will have iphone and the company reputation will go down just like samsung.