Mercedes B-Class (2014) is 27 mm (1.06 inch) longer, 21 mm (0.83 inch) wider, 8 mm (0.31 inch) higher and has 56 liters (1.98 ft3) bigger cargo space than Toyota Matrix (2018).
Toyota Matrix (2018) is 105 kg (231 lbs) lighter than Mercedes B-Class (2014).