What's the better overall option?
Is the zs hybrid, electric?
What's better mileage wise.?
There are two ZS available electric and simple petrol 1.5
In between MG HS and ZS 1.5 obviously HS is better since has so many more features and it is bigger in size. As for comparison between MG HS and ZS Electric you will have to calculate the fuel cost of electric looking at home charging cost as well as fast charging stations cost at different locations