I heard the fact is that this function is based on region cause setup rely on the regulations in different country.
In China, Only Huawei can be used to Auto level.
I tried both I4 and 6.
i4 sold better in China mostly because of the import tax difference:9% vesus 25%.
i4 has better fuel economy ;
turbocharging voice(personally like it);
when speed up, you can feel the turbo( less linearity),
Also I find out 2 bugs these days and raised to my sales.