Audi A7 Sportback (2017) is 550 mm (21.65 inch) longer, 107 mm (4.21 inch) wider and has 114 liters (4.03 ft3) bigger cargo space than Mercedes GLA-Class (2016).
Mercedes GLA-Class (2016) is 74 mm (2.91 inch) higher and 435 kg (959 lbs) lighter than Audi A7 Sportback (2017).