Chinese auto startup Nio just had its $1 billion US initial public offering. While the share price fluctuates, investors ask the same question: will the Shanghai-based upstart supplant Tesla as the world’s top luxury electric car brand? Like Tesla, its cars offer sleek, space-age designs. It also has a flair for marketing stunts: in Nio’s case, setting the fastest lap ever recorded by an electric car at Germany’s Nürburgring. But Nio is offering cutting-edge technology at jaw-dropping prices. Its ES8, priced at RMB 448,000 ($70,000), costs only around half as much as a Tesla Model X does in China.