Mercedes B-Class (2020) is 41 mm (1.61 inch) longer, 270 mm (10.63 inch) higher, 4 kg (9 lbs) lighter and has 220 liters (7.77 ft3) bigger cargo space than Toyota GR Supra (2018).
Toyota GR Supra (2018) is 64 mm (2.52 inch) wider than Mercedes B-Class (2020).