SRΛSC
I'd get the XR
MrWakeup
So it really comes down to performance and longevity.
The XR will give better performance. And potentially give you a longer life span for iOS support and useability in the future.
The 6s came out two years ago today. The XR should be out in the next 3 weeks.
If money is no object, save and wait for the XR.
?
6s, I still have a 6 and I love it.