Ford Mustang (2018) is 397 mm (15.63 inch) longer, 114 mm (4.49 inch) wider, 101 mm (3.98 inch) higher and has 182 liters (6.43 ft3) bigger cargo space than Porsche 718 Cayman (2017).
Porsche 718 Cayman (2017) is 371 kg (818 lbs) lighter than Ford Mustang (2018).