BMW i8 (2019) is 82 mm (3.23 inch) wider and 90 kg (198 lbs) lighter than Mercedes E-Class (Coupe) (2020).
Mercedes E-Class (Coupe) (2020) is 155 mm (6.10 inch) longer, 139 mm (5.47 inch) higher and has 271 liters (9.57 ft3) bigger cargo space than BMW i8 (2019).