Mercedes GL-Class (2015) is 767 mm (30.20 inch) longer, 198 mm (7.80 inch) wider, 555 mm (21.85 inch) higher and has 530 liters (18.72 ft3) bigger cargo space than Porsche 718 Cayman (2014).
Porsche 718 Cayman (2014) is 1139 kg (2,511 lbs) lighter than Mercedes GL-Class (2015).