I've been in the market for a BYD and the salesman just called me and told that all cars are $3000 off and free home charger for the next three days.
You can click through the order process to see:
Home Charger (White): Included
Campaign Discount: -$3,000
Because the premium is already very fast. If you are not looking to race or break the law there is very little reason to get a faster car.
Premium is more efficient, has better range and is cheaper. Performance lets you show off sometimes and that is about it.