Tata Gravitas is not launched yet but in general, the down payment remains in between 20-30% of the on-road price of the vehicle and ROI varies between 9.25-11.5% and it totally depends on the CIBIL/Credit score of an individual.
At present, it would be difficult to give any verdict because both the cars are in queue to get launched. So we would suggest you to wait for their launch so that we can provide you a fruitful comparison. Stay tuned.
Tata Gravitas has not been launched yet. So, it would be difficult to give any verdict for its actual performance. You can expect similar interior quality as Tata harrier and it will compete against MG Hector Plus, Mahindra XUV500.