Mercedes AMG GT (2018) is 9 mm (0.35 inch) wider and 169 kg (373 lbs) lighter than Porsche Panamera (2016).
Porsche Panamera (2016) is 468 mm (18.43 inch) longer, 128 mm (5.04 inch) higher and has 95 liters (3.35 ft3) bigger cargo space than Mercedes AMG GT (2018).