BMW 8 Series (G14) (2020) is 424 mm (16.69 inch) longer and 68 mm (2.68 inch) wider than Mercedes GLA-Class (2017).
Mercedes GLA-Class (2017) is 272 mm (10.71 inch) higher, 370 kg (816 lbs) lighter and has 85 liters (3.00 ft3) bigger cargo space than BMW 8 Series (G14) (2020).