The display size of Xiaomi Mi A3 is 6.3 inch and a screen resolution of 1080*2340 pixels. Powered by dual + hexa core processor with qualcomm snapdragon chipset, it runs at a clock speed of 2 GHz. Its variant is 4GB + 64 GB. It has AMOLED display and supports Adreno 616 graphics.
MI A2 64 GB
Mi A2 (Blue, 4GB RAM, 64GB Storage)

is also known as Samsung Galaxy A8s Lite. It has the same display size and screen resolution. Its processor is powered by Qualcomm snapdragon 675 chipset and runs at a clock speed of 2.2 GHz. Its variant is 6GB + 128GB. It has IPS LCD display and supports Adrena 612 graphics.

Read More :-http://www.techymob.com/compare-samsung-galaxy-a60-vs-xiaomi-mi-a3-price-specs-review/