The Moto Z3 and Z3 Play are apparently both using a 6-inch full HD display, and a third Moto Z3 device with a Qualcomm Snapdragon 845 onboard is expected to arrive after a while with a higher-resolution touchscreen.
https://www.notebookcheck.net/Moto-Z3-and-Z3-Play-images-surface-online.278780.0.html