Mercedes AMG GT (2017) is 88 mm (3.46 inch) longer, 136 mm (5.35 inch) wider, 19 mm (0.75 inch) higher and has 166 liters (5.86 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 194 kg (428 lbs) lighter than Mercedes AMG GT (2017).