Mercedes B-Class (2020) is 360 mm (14.17 inch) longer, 16 mm (0.63 inch) wider, 118 mm (4.65 inch) higher and has 50 liters (1.77 ft3) bigger cargo space than Seat Ibiza (2017).
Seat Ibiza (2017) is 534 kg (1,177 lbs) lighter than Mercedes B-Class (2020).