I think the comment above about mostly using it to make calls and send texts and it definitely not being a desktop replacement is key here. It depends, almost entirely, on what you want to do. My wife calls, texts, facebooks and whatsapps. That’s it. Occasionally she may fire up an internet search. For her, the simplicity, uniformity and familiarity of iOS is perfect. I, on the other hand, find it infuriatingly restrictive and intentionally difficult and wil never buy their overpriced, overhyped nonsense. That said, I’m writing this on my iPad which I use for pretty much the same interactions as my wife and it’s quite easily the best device I’ve had for those functions.
If you go Andriod, get a good one. Nexus 6p here – the best, most versatile, most “tweakable” phone I’ve ever had the pleasure of owning. Half the price (monthly) of the equivalent iPhone and I can make it do pretty much anything I like.