BMW 6 Series Gran Turismo (2019) is 235 mm (9.25 inch) longer and 390 kg (860 lbs) lighter than Porsche Cayenne (2021).
Porsche Cayenne (2021) is 52 mm (2.05 inch) wider, 149 mm (5.87 inch) higher and has 61 liters (2.15 ft3) bigger cargo space than BMW 6 Series Gran Turismo (2019).