For a perfect car choice, a comparison is to be done on the basis of price, size, space, mileage, performance, features, and other specs. Both cars have their own benefits. On the basis of the above factors, the more suitable option would be Tata Tiago. The car is well equipped with good features at the best price. For a detailed comparison, follow the below link - Compare. Moreover, you may have a test drive of the cars for a better idea of comfort and drive quality by visiting the nearest dealer in your city. You can click on the following link to see the details of the nearest dealership and selecting your city accordingly - Dealers.
For CSD availability we would suggest you to exchange your words with the CSD staff as they will be the better person to assist you with the tie-up dealerships. Moreover, you can click on the link to check the nearest dealership - Dealership.