Ford Mustang (2018) is 411 mm (16.18 inch) longer, 115 mm (4.53 inch) wider, 103 mm (4.06 inch) higher and has 170 liters (6.00 ft3) bigger cargo space than Porsche Cayman (2019).
Porsche Cayman (2019) is 407 kg (897 lbs) lighter than Ford Mustang (2018).