Additionally, the partitions are different between the two devices due to the Mi A1 using the A/B system that the Pixel devices uses. The A/B systems means that when the device gets an update it will be downloaded and installed on the second system partition and when you restart that second partition will swap to become System A instead of B to make the updating process seamless.
Also Read: Mi A1 vs. Mi 5x: 4 key differences
DON'T FLASH THE MI A1 ANDROID ONE FIRMWARE ON YOUR MI 5X, IT WILL BRICK YOUR DEVICE.
With the Mi A1, you get a 5.5-inch FHD LTPS IPS LCD display, Qualcomm Snapdragon 625, 4GB RAM, 64GB storage plus microSD support up to 128GB, 12MP Wide Angle + 12MP Telephoto (Same like the iPhone 7 Plus) for the best low-light, zoom and anti-blur photos with enhanced image processing, 5MP front camera, 3080mAh battery, and Android 7.0 Nougat.
The Xiaomi Mi A1 will be available Offline and Online in India starting 14,999 INR (233 USD) on September 12.