Xiaomi Mi MIX vs Xiaomi Mi Mix EVO
Both the phones have their pros and cons,lets analyze :-
Advantages of Xiaomi Mix Evo :-
1.Octa Core CPU:-More cores result in better parallelism, meaning more tasks can be processed in parallel without slowing down the User Interface.
2.Supports VoLTE:-Xiaomi Mix Evo is VoLTE Enabled. You can use this to make calls over 4G network. It is compatible with Reliance Jio.
Verdict - In my opinion, Xiaomi Mix Evo is better overall
You can also compare these devices on 91mobiles