Android if you like to be more in control of your phone, iPhone if you don't like too much control. Android if you can troubleshoot, iPhone if you don't like trouble.
I have always had apple iphone's. But in comparison to Samsung's, they are always a step behind when it comes to technology.
Actually, I like both operating systems, but I would personally prefer Android, because I'm not part of the Apple eco-system.
There are so many great deals on Android phones sold on amazon or aliexpress.com I just got my dad a Umidigi F1 Play for 200$ USD on Amazon.com 6GB ram, 64GB storage, 8 core processor, rear fingerprint sensor. Keep doing some research.