I would humbly disagree with the recommendation to buy a petrol only due to maintenance.
Contrary to what some would say, an oil and filter change for a diesel IS NOT needed at 3,000km unless you're using ghee instead of an appropriately spec'd oil. Manufacturer recommendation for oil and filter change is 5,000km for severe duty (including dusty environments), and 10,000km for "normal" duty. As for costs, if you were to go to a Toyota showroom for service, the cost would be comparable to a petrol engine oil and filter change.
Shoaib is correct in that a diesel engine is louder than a petrol...but it isn't much louder when you're inside the vehicle. The diesel variant has better pickup/acceleration than the petrol version.
As for petrol driving "light" compared to diesel...I'm not sure what Shoaib means here. The diesel version is about 100kg heavier...not noticeable to me, and the fact that it has 205nm more torque easily overcomes the added weight. I will say that I am getting 10-12km/l fuel average in my diesel...and I recall petrol drivers getting 6-8km/l. So you can figure that with the cost difference in fuel (diesel is about 17% more expensive than petrol), you're getting around 40% better fuel average.
Putting objectivity aside, I'd also say that after driving both variants...the diesel is just more fun to drive thanks to the extra power. You also get a few more shushkas, but those are nominal.