Lexus RX (2018) is 496 mm (19.53 inch) longer, 109 mm (4.29 inch) wider, 163 mm (6.42 inch) higher and has 35 liters (1.24 ft3) bigger cargo space than Mercedes B-Class (2017).
Mercedes B-Class (2017) is 595 kg (1,312 lbs) lighter than Lexus RX (2018).