With Audi’s new electric flagship, the E-Tron GT, Volkswagen Group—the parent company of Audi and Porsche—seems to be asking its customers a simple question: What is your preferred flavor of fast, sleek, electric German four-door coupes? Not that the Audi E-Tron GT and the Porsche Taycan are the same car, but they are built upon the same electric vehicle architecture, use similar electric powertrains, and feature rakish, low-slung body styling that makes it easy to see that they’re more than distant cousins.