Recently, I have bought vitz 1000cc Alhamdulillah. And I am happy with it. Its pick is average but again I am not that kind of a driver. I can withstand some cons with all the pros it has to offer. Belta I assume will be more sluggish due to the fact that it has a much heavier body.
One more thing, Vitz/Belta 1000cc will have an annoying engine sound too. So you better test drive a car and see if you can withstand that noise.
These cars also have engine knocking issue due to poor quality petrol, hence you will have to fill up high octane(premium) petrol is some quantity too. Like I get 10 litres high octane and 30 litres super. So add that cost too. Knocking otherwise will be very annoying and will cause damage too.
Personally I would say, search for a 1300cc version in either belta/vitz. You wont face any issues.