与你自己的车的贵贱关系不大only applies to liability. For comprehensive, it's more expensive to insure more expensive cars since your insurance company needs to spend more to compensate your more expensive cars.
与你自己的车的贵贱关系不大only applies to liability. For comprehensive, it's more expensive to insure more expensive cars since your insurance company needs to spend more to compensate your more expensive cars.