BMW X6 (2015) is 499 mm (19.65 inch) longer, 155 mm (6.10 inch) wider, 91 mm (3.58 inch) higher and has 145 liters (5.12 ft3) bigger cargo space than Mercedes GLA-Class (2018).
Mercedes GLA-Class (2018) is 537 kg (1,184 lbs) lighter than BMW X6 (2015).