Mercedes GLK-Class (2014) is 144 mm (5.67 inch) longer, 39 mm (1.54 inch) wider, 404 mm (15.91 inch) higher and has 300 liters (10.59 ft3) bigger cargo space than Porsche 718 Cayman (2017).
Porsche 718 Cayman (2017) is 439 kg (968 lbs) lighter than Mercedes GLK-Class (2014).