Dear, Petrol Version is having + point of low maintainance / low cabin noise but -ve point is of high petrol price. if you can pay the price ... go for it.
Diesel drive is very awesome... but noise and maintainance costs you -ve.
if you plan to keep vehicle for less than 3-years, choose diesel (as new diesel engine will let you enjoy max.)
if you plan to keep vechile for more than 3-years, choose petrol ....
by the way, diesel engine lasts more if properly maintained.