The can of worms is open now.
Android forever annoys me, and the more you customise it, the less reliable it gets. I'm not saying it's bad, far from it, but IMO iOS is better for me at least, in terms of the way apps work, there's still no comparison there either (some are very similar admittedly). The nicest Samsung phones are further crippled by Samsung themselves on the software front.
I definitely find iOS generally more fluid than Android on the equivalent devices.
Even If I wanted an S8+, something I considered, the amount of hassle not having iMessage for example would be annoying.
As I've said in the past, I get my phone out of my pocket, usually to check notifications and then open an app. At both of these things iOS is as good/better, and I think most people use their phone a similar way. Scrolling along homescreens checking little widgets isn't useful, the half-baked iOS widget implementation is even less useful most of the time.
But equally I can understand why people wouldn't want something as limited as iOS and can easily prefer Android, it's still excellent and there are a great selection of phones too.
All personal preference at the end of the day.