I have an iPhone 5s and my woman has a S4. I have had like every other iPhone since the very first one came out and was almost considering getting an android phone this time. I have very glad I didn't.
My battery lasts way longer than hers. And I use my phone more than she does.
We both use the same cell towers and my signal is always much better than hers. Here is usually pretty good but when we get somewhere where it is weak, her phone will drop the call and she has to use mine. Mine won't have 5 bars with LTE, but it still works.
My camera is also much better. I know the 5S has a different camera than the 5C, but when you look at our pictures on the big computer screen, mine look much better. The camera in the 5s has some cool things designed in so it is supposed to be better than the megapixel count would suggest.
My internet is much faster than hers. Remember, we both use the same cell towers and one is less than a block from my house so it must be the phone.
Also, my phone always works. I never have to reset it or deal with it freezing up or anything of that. Her phone has problems once in a while, not constantly by any means, but it's still not something I have to deal with.
The apps for the iPhone are much better I feel. I mean there is no
disneyland explorer (which is a really cool app) or watch disney movies anywhere for android phones.
I don't have a big huge case, I also have the Apple leather case and I drop my phone a lot. I am a clumsy person, and there is no damage on my phone at all.
And if something does go wrong, apple is just a phone call away and they will help you fix anything. I feel they go above and beyond. I had a phone stolen and bought a used iPhone and had a problem, and apple was still there helping me, for free. (Turns out the problem was with the cheap sync cable I was using, not with the iPhone or iTunes.
My vote is 100% iPhone. No question.