I have kept zero meter cultus efi and non efi used, Wagon R ac is another league, Wagon R AC is one thing that will impress you when you turn it on. obviously ac gas is very important factor but I am talking when car is new so it is out of question.
In june/july at 12 pm, i mostly drive it with blower on 2 or 1, and on summer evening i cant stand ac even at position 1 so i push thermostat to bit less cooler position, that will give you insight how good it is.
One technical reason for this is, Wagon R dashboard is well insulated, I observed AC blowing cool air with hot dashboard, but in cultus if dashboard is hot there is no way you get colder air, for cultus dashbaord should not be hot