Mercedes CLA-Class (2017) is 251 mm (9.88 inch) longer, 143 mm (5.63 inch) higher and has 320 liters (11.30 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 22 mm (0.87 inch) wider and 44 kg (97 lbs) lighter than Mercedes CLA-Class (2017).