While turbocharged engines theoretically could offer better efficiency, due to more air intake and thus better burning, they are very sensitive to driving style and in real-world scenarios return a lower mileage than a naturally aspirated engine (other factors being the same).
This is because a turbo engine injects more fuel into the cylinder every time it senses upcoming knocking. This happens when you give a bit more throttle input than required. Thus, you will very likely see better mileage with the naturally aspirated Hyundai Verna. 
