Do you have the claimed top speeds for those models?
The more aerodynamic versions should have a higher top speed.
In Europe Dacia sells a hatchback car called the Sandero.
They also have a version called the Sandero Stepway which has bigger wheels and appears to be jacked up in the air slightly to give it a slight SUV look.
Interestingly, Dacia provides CDA data for these 2 versions, with the conventional hatchback coming in at 0.76 and the Stepway at 0.91.
Thats works out to be 19.7% extra aero drag for the Stepway.
Dacia charges an extra 1500 euro for the Stepway.
https://www.dacia.co.uk/vehicles/our...ml#grade-52B-1
https://www.dacia.co.uk/vehicles/our...52B-0|overview