I had been using iPhones for a decade, could a fanboy.
But your review lacks one modern day miracle and powershifter, that’s there is no single reference for OnePlus devices.
Specially you should try OnePlus 6, not 6T because the fingerprint. perfect of both world and probably end game. OnePlus specially with OnePlus guestures, Face Unlock and probably with a easiest custom ROM made my perfect phone after 25 years of gadget love. It says something.
Both have ups and downs, for the casual phone user iPhone is no brainer but lately iOS tinkerbility have fallen sub far. that’s it.