BMW 5 Series Gran Turismo (2020) is 397 mm (15.63 inch) longer, 189 mm (7.44 inch) higher and has 180 liters (6.36 ft3) bigger cargo space than Mercedes AMG GT (2014).
Mercedes AMG GT (2014) is 72 mm (2.83 inch) wider and 100 kg (220 lbs) lighter than BMW 5 Series Gran Turismo (2020).