Help me choose between Ciaz and City. Which has less maintenance cost and best resale value.

Marutis are cheapest to maintain without doubt. But Honda's are not too bad either. It might be only marginally expensive to maintain. Say about 5000 - 7000 more per year or so. Generally, all cars from Maruti have good resale value but if a car did not sell very well that expect a low resale value, this can be even said about some of the maruti cars like A Star, Kizashi, Baleno etc. You can expect about same amount of depreciation of these cars considering Honda City is the best selling car in this segment.