Audi A4 Avant (2016) is 70 mm (2.76 inch) longer, 630 kg (1,389 lbs) lighter and has 155 liters (5.47 ft3) bigger cargo space than Mercedes GLC-Class (2020).
Mercedes GLC-Class (2020) is 48 mm (1.89 inch) wider and 202 mm (7.95 inch) higher than Audi A4 Avant (2016).