I like to tinker with the devices so Android would be the more likely route but we went the iPhone route years ago since they had the better camera at the time. The iPhone has been very reliable and has done everything we wanted including tethering our laptop, acting as a hotspot, working with our cell phone booster in remote areas, and doing wi-fi calling in remote areas with wi-fi but no cell signal.
The security is good on iPhones and one report a few years ago said 97% of mobile phone malware was in the Android eco-system.
The downside of iPhone is the O/S sometimes lacks the options I am looking for, for example I run in low-power battery mode all the time for max battery life, and the option shuts off at 80% charge with no way to permanently enable it. So have to keep re-enabling it. ITunes is useless also. I have all my own CD collection and have converted them to 320 kbit MP3s but the only way to get them in the phone is via the iTunes program. Drag and drop would be much easier like on Android.
No external mini-SD card expansion slot is a huge disadvantage of iPhones also. As is their proprietary lightning connector versus USB-C.
About 2/3 of friends and family are on iPhones