Nissan GT-R (2016) is 293 mm (11.54 inch) longer, 95 mm (3.74 inch) wider, 76 mm (2.99 inch) higher and has 153 liters (5.40 ft3) bigger cargo space than Porsche Cayman (2020).
Porsche Cayman (2020) is 410 kg (904 lbs) lighter than Nissan GT-R (2016).