I had a Samsung before and never had any problem. I switched to Apple phone because I do have an apple computer and I wanted to make things easier between both devices. I'v never been interested in the camera capabilities of any smart phone at all.
If I am going to photograph something, I use either my D750 or my D500. Period. If I have shot 2 photos since I am using a smart phone, that would be too much, so I do not really care at all about phone cameras. I am not going to buy a phone just because the camera is better than the other, etc, etc.
It would be hard for me to make the decision to pay 1k to buy the iPhone when, for $200 more, I can buy the Sigma Art lens 24-70 f/ ... the new iPhone X does not impress me. I do not want to go completely wireless so I would stay with my 6s and if I decide to upgrade, then probably it would be to the Note 8 ... but I will wait a bit longer.