Audi A7 Sportback (2017) is 318 mm (12.52 inch) longer, 21 mm (0.83 inch) wider, 270 kg (595 lbs) lighter and has 185 liters (6.53 ft3) bigger cargo space than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 239 mm (9.41 inch) higher than Audi A7 Sportback (2017).