This year, Huawei introduced a variety of feature phones competing with Apple and Samsung products. If you are thinking of buying one of the Chinese company's phones, you can see the following comparison, which focuses on the most important characteristics of these devices:
Screen Size
Mitt 20 Pro: 6.39 inches of Oled.
Met 20: 6.53 "LCD" type.
Mitt 20x: 7.2 inches of Oled type.
P20 Pro: 6.1 inches of "Olyd" type.

Healer
Dead 20 Pro: Kerin 980.
Dead 20: Kerin 980.
Dead 20X: Kerin 980.
Pro 20 Pro: Kerin 970.

Operating System
Meta 20 Pro: Android 9.
Meta 20: Android 9.
Meta 20X: Android 9.
P20 Pro: Android 8.1.

memory
Dead 20 Pro: RAM 6 or 8 GB / 128 or 256 GB read memory.
Dead 20: RAM 4 or 6 GB / 128 GB readable memory.
Dead 20x: RAM 6 GB / 128GB readable memory.
P20 Pro: RAM 6/128 GB read memory.

storage capacity
Dead 20 Pro: 256 GB, nano memory card.
Dead 20: 256 GB, nano memory card.
Dead 20x: 256 GB, nano memory card.
P20 Pro: 128 GB.

Camera
Met 20 Pro: Triple, 40, 20, 8 Megapixel camera, and 24 megapixel front camera.
Dead 20: triple camera, 12, 16 and 8 megapixels, and the other front with 24 megapixels.
Met 20x: triple camera, 40, 20, 8 megapixels, and other front 24 megapixels.
P20 Pro: Triple, 40, 20, 8 Megapixel camera, and 24 megapixel front camera.

the battery
Dead 20 Pro: 4200 mAh / hour.
Dead 20: 4000 mAh.
Dead 20x: 5000 mAh.
P20 Pro: 4000 mAh / hour.