Citroen DS3 (2017) is 250 kg (551 lbs) lighter than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 443 mm (17.44 inch) longer, 71 mm (2.80 inch) wider, 99 mm (3.90 inch) higher and has 201 liters (7.10 ft3) bigger cargo space than Citroen DS3 (2017).