Duh, Cultus is just like Mehran, due to a very high demand of the 1000cc Cultus in the govt sector they didnt stop the Cultus, any one who gives cars to employees and specialy when it comes to govt they prefer going for Liana/City or Corolla for a 1.3L segment car.
Parts, Cultuses atleast the efi ones parts arent cheap at all.
Fuel, I doubt that cultus gives a better fuel average over a Swift. (petrol version only)
Luggage space, i guess Swift has less space.
4 pasengers, Cultus might have more leg space, but Swift is wider hence more comfortably 3 Adults can be seated in the back seat.