BMW 5 Series Gran Turismo (2017) is 458 mm (18.03 inch) longer, 270 mm (10.63 inch) higher and has 150 liters (5.30 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 38 mm (1.50 inch) wider and 270 kg (595 lbs) lighter than BMW 5 Series Gran Turismo (2017).