BMW 5 Series Gran Turismo (2017) is 21 mm (0.83 inch) wider, 86 mm (3.39 inch) higher and has 67 liters (2.37 ft3) bigger cargo space than Cadillac CT6 (2018).
Cadillac CT6 (2018) is 180 mm (7.09 inch) longer and 252 kg (556 lbs) lighter than BMW 5 Series Gran Turismo (2017).