BMW 6 Series Gran Turismo (2018) is 239 mm (9.41 inch) longer, 58 mm (2.28 inch) wider, 96 mm (3.78 inch) higher and has 227 liters (8.02 ft3) bigger cargo space than INFINITI Q50 (2014).
INFINITI Q50 (2014) is 40 kg (88 lbs) lighter than BMW 6 Series Gran Turismo (2018).