BMW 6 Series Gran Turismo (2019) is 301 mm (11.85 inch) longer, 143 mm (5.63 inch) higher, 17 kg (37 lbs) lighter and has 277 liters (9.78 ft3) bigger cargo space than Ford Mustang (2018).
Ford Mustang (2018) is 13 mm (0.51 inch) wider than BMW 6 Series Gran Turismo (2019).