Jaguar XJ-Series (2020) is 862 mm (33.94 inch) longer and 114 mm (4.49 inch) wider than Mercedes B-Class (2018).
Mercedes B-Class (2018) is 97 mm (3.82 inch) higher, 380 kg (838 lbs) lighter and has 56 liters (1.98 ft3) bigger cargo space than Jaguar XJ-Series (2020).