I don't think it's just because they are "energy efficient". Teslas are heavy, powerful vehicles. The tires they need are usually rated for extra load (XL), and have a high speed rating (W/Y). If you went for EV tyres they likely contain an acoustic lining too as road noise is more noticeable in one. Unclear if that's really needed though. Either way it sounds like you went for premium tires which is probably the right choice for a ~400hp, 2 ton car.