BMW 8 Series (G15) (2018) is 314 mm (12.36 inch) longer and 83 mm (3.27 inch) wider than Honda Clarity (2020).
Honda Clarity (2020) is 302 mm (11.89 inch) higher, 425 kg (937 lbs) lighter and has 18 liters (0.64 ft3) bigger cargo space than BMW 8 Series (G15) (2018).