BMW 6 Series Gran Turismo (2018) is 424 mm (16.69 inch) longer, 91 mm (3.58 inch) wider, 109 mm (4.29 inch) higher and has 218 liters (7.70 ft3) bigger cargo space than Lexus IS (2014).
Lexus IS (2014) is 140 kg (309 lbs) lighter than BMW 6 Series Gran Turismo (2018).