If privacy and security are important to you, consider this: Apple's revenue model involves selling hardware. Google's revenue model, which Android is tied into, involves collecting information about users and selling it to other people. The now-old saw is, if an online product is free, then you're not the customer — you are the product to be sold.
While not perfect in this regard, I believe Apple has a strong interest in providing users of their hardware with extremely robust security.
Some of this trickles down to third-party apps within the respective ecosystems, also. For instance, the sheriff's department where I live provides iOS and Android apps that will send push notifications about local incidents, road closures, etc. to your phone. They clearly (and sensibly) purchased app templates that they then customized for local use.
Here's the difference in their two apps: The iOS version of the app asks permission to send you push notifications, and still works if you deny it access to your location info. The Android version asks for access to your microphone, camera, contacts, call history, browsing history, etc. etc. ad nauseum, and I heard one report that the app won't work without access to all these things.
This is a very local, specific example, but it's one of many, and a good way to highlight the difference I mentioned between how Apple and Google treat your personal information. I think the iPhone is well worth the premium price.