Based on the A3 Sportback, the e-tron has a few styling tweaks as well, namely in the grille (bisected by 14 horizontal slats), the hidden exhaust pipe (it does, after all, still have a gasoline-burning engine) and unique 19-inch wheels.
Hybrids and EVs typically run smaller rolling stock for lower resistance, so that bit will likely change when the A3 e-tron reaches production, with US availability considered a strong possibility.