BMW 8 Series (G16) (2019) is 672 mm (26.46 inch) longer, 98 mm (3.86 inch) wider and has 5 liters (0.18 ft3) bigger cargo space than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 204 mm (8.03 inch) higher and 331 kg (730 lbs) lighter than BMW 8 Series (G16) (2019).