When you trade cars the first thing to do is quit looking at the ads. Same concept when you go to a smart phone. You don't want to know what the one you didn't buy will do, concentrate on what you have.

This is kind of like asking which tractor or computer? Son in law went Android, a Galaxy I believe. At the same time I got an iPhone. Both were excellent choices and each has things the other one does better. He can do things I can't, and I can do things he can't.

I have an iPad and a MacBook pro.  I think that is the key to choosing an iPhone or not an iPhone.   My calendar is synched on each of them. I have some apps on both the pad and phone. They work identically. I got a 4s because it is physically a bit smaller than the 5 and all my iPad cables plug into it.  The 5 needs a different plug.

If you aren't fruit computing I'd lean toward the Android. 

One thing you're going to hate is the switch from the old to the new.  Outgoing with a flip phone it is open, hold down a number key until autodial hit, and talk. With my iPhone is is tap, unlock, tap, tap, tap, tap, tap, tap, maybe tap a couple more times, talk. 

incoming with the flip is ring ... open ... talk

Incoming with a smart phone is ring ... unlock (may be a simple slide or touch, may be more depending on the phone) ... talk.

It seems any tme you add more capabilty you have to add a level of complexity. Remember what I said about not looking any more once you buy?  Same concept holds when using a smart phone.  Forget about how easy the flip was to work. This is the new reality