Mercedes A-Class (2015) is 163 mm (6.42 inch) higher, 56 kg (123 lbs) lighter and has 157 liters (5.54 ft3) bigger cargo space than Porsche 718 Cayman (2020).
Porsche 718 Cayman (2020) is 166 mm (6.54 inch) longer and 23 mm (0.91 inch) wider than Mercedes A-Class (2015).