Having used both iOS and Android – Android is way, way better. Add Nova Launcher to any Android phone – perfect. No need to deal with TouchWiz. Full customisation of pretty much everything. On-screen widgets. Adoptable storage which basically works like a Fusion Drive allowing you to use a SD card as expansion of internal storage. Last, but not least, a huge choice of devices with various capabilities, sizes, screen types and price points. If somebody offered me a brand new iPhone 6s+ in exchange for my Xperia, I would take it, sell the iPhone, buy a new Xperia and pocket the difference.
(I imagine this post won't get many likes.)
(I imagine this post won't get many likes.)