I didn’t name it to not sound like one of those owners but it’s the best selling EV: a Tesla model y. It also has a LG battery pack, that performs better in the cold than the Panasonic, CATL, or BYD batteries Tesla also use.
About the worse EVs for winter, that would be the ones with no or small battery heaters. The old imiev for example.
A 20% drop of range by -5 is pretty good. Your wife may enjoy a cold interior or trust the temperature display of the car AC.