BMW 6 Series Gran Turismo (2018) is 554 mm (21.81 inch) longer, 62 mm (2.44 inch) wider, 85 kg (187 lbs) lighter and has 159 liters (5.62 ft3) bigger cargo space than Mercedes GLK-Class (2017).
Mercedes GLK-Class (2017) is 160 mm (6.30 inch) higher than BMW 6 Series Gran Turismo (2018).