Yes, in terms of engine performance & mileage on petrol. You expect to get 12-13 Km/litre within the city driving with AC. And obviously the advantage of driving an Automatic transmission car, which is a big blessing especially in traffic jams.
However it's not recommended for CNG at all. So even if you buy a Vario with CNG kit that was once installed and then removed, it may still have damaged the gearbox/transmission. So buy a Vario which has only been driven on petrol.