BMW 8 Series (G14) (2018) is 314 mm (12.36 inch) longer and 83 mm (3.27 inch) wider than Honda Clarity (2015).
Honda Clarity (2015) is 304 mm (11.97 inch) higher, 424 kg (935 lbs) lighter and has 88 liters (3.11 ft3) bigger cargo space than BMW 8 Series (G14) (2018).