This doesn't seem to be true. Hyundai Kona Electric 64kWh gets 3.6 Miles per kWh and the Kia e-Niro 64kWh gets 3.5 Miles per kWh in real world tests.

They are more efficient and have more range than any of Teslas offerings:

https://www.whatcar.com/news/what-car-real-range-which-elect...