Well the most imp thing is that both the cars are the same technically, the advantage chevy has is that it's foreign assembled and therefore no quality issues and it has a strong body which I rate as the MOST imp thing in a car. Now the advantages of santro, because of it's light body(as it's assembled on Pakistan) it has a better acceleration and the 1 litre engine adds to it and it may also prove to be more economical because of the same reason.