There’s not really a significant difference unless you’re talking about aero and wheels/tires, and most sports cars are also fairly aerodynamic.
Look at the difference in efficiency between Model 3 Performance and a Chevy Bolt.
Tires can be swapped as needed. As can spoilers and other aero equipment to add down force at the track.
That’s not a great comparison since I’d categorize the Bolt as being fairly inefficient. It has poor aerodynamics (wrong shape and no flsf bottom) which results in a larger range loss when range matters most at interstate speeds.
The Bolt is efficient in city driving, but not otherwise. I’d say a better comparison would be between the Mach e and model Y where you do see a meaningful difference in efficiency.