Huawei has indeed made the 6P, a phone that is largely thought to be the more premium of the two. It features a metal body, higher-end processor, is bigger, and more expensive. Some would consider the 5X to fall into the mid-range category, while the 6P is by all means a true flagship.
Below, you will find the official spec list as presented to us by Google.
Nexus 6P Specs (Official)
|Display||5.7-inch WQHD AMOLED (2560x1440, 518ppi)|
|OS||Android 6.0 Marshmallow|
|Processor||Qualcomm Snapdragon 810 v2.1, 2.0 GHz Octa-core 64-bit, Adreno 430 GPU|
|Camera||12.3MP rear camera (1.55 μM, f/2.0), IR Laser assisted autofocus, 4K (30 fps) video capture, Broad-spectrum CRI-90 dual flash; 8MP front camera|
|Battery||3,450 mAh battery, Fast charging - up to 7 hours of use from only 10 minutes of charging|
|Dimensions||159.3 X 77.8 X 7.3 mm, 178 g|
|Other||USB Type-C, Fingerprint sensor, Accelerometer, Gyroscope, Barometer, Proximity sensor, Ambient light sensor, Hall sensor, Android Sensor Hub|
|Colors||Aluminium, Graphite, Frost|