First and foremost, the Huawei Mate X differs out of the gate from the Samsung Galaxy Fold because it has a “Falcon Wing Mechanical Hinge” that allows its display to fold and not leave a sizable gap between folded parts. The display is a flexible OLED panel at 8-inches (8:7.1, 2480×2200) when fully unfolded, but then splits into two when folded.
Source: Huawei’s Mate X Does Indeed Fold, is Kinda Cool Too