BMW 6 Series Gran Turismo (2018) is 306 mm (12.05 inch) longer, 145 mm (5.71 inch) higher, 17 kg (37 lbs) lighter and has 285 liters (10.06 ft3) bigger cargo space than Ford Mustang (2017).
Ford Mustang (2017) is 14 mm (0.55 inch) wider than BMW 6 Series Gran Turismo (2018).