My first couple of phones were Android and then I switched to iPhone for a couple of years and hated it. The lack of control I had over phone settings was awful! There's no back button (as others mentioned) and the UI is not intuitive at all. Those that claim iPhone's are easier probably have no android experience.
Aside from that all that, if you get into the world of smart things Androids are much more powerful. Apps like Tasker, Automate and IFTTT (IFTTT has an iPhone app, but its capabilities are seriously limited with Apple devices) are obscenely powerful and really only limited to your imagination (and your wallet).