Also, 5X uses the USB-C connector, so you have to update all your cables and adapters on your desk and in your car. A real pain. When you're out in the world and need a charge-up, you'd better be carrying a USB-C cable, because no one else will have one.
I consider the 5X a side-grade and not of any particular value if you already have a 5. The 6P is at least a larger handset with a larger battery so it's got that going for it.