Mercedes C-Class (Coupe) (2014) is 213 mm (8.39 inch) longer, 135 mm (5.31 inch) higher and has 181 liters (6.39 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 30 mm (1.18 inch) wider and 164 kg (362 lbs) lighter than Mercedes C-Class (Coupe) (2014).