BMW 8 Series (G14) (2019) is 426 mm (16.77 inch) longer and 98 mm (3.86 inch) wider than Mercedes GLA-Class (2015).
Mercedes GLA-Class (2015) is 155 mm (6.10 inch) higher, 528 kg (1,164 lbs) lighter and has 71 liters (2.51 ft3) bigger cargo space than BMW 8 Series (G14) (2019).