BMW 7 Series (2018) is 552 mm (21.73 inch) longer, 189 mm (7.44 inch) higher and has 164 liters (5.79 ft3) bigger cargo space than Mercedes AMG GT (2015).
Mercedes AMG GT (2015) is 37 mm (1.46 inch) wider and 215 kg (474 lbs) lighter than BMW 7 Series (2018).