BMW 3 Series Touring (2018) is 275 mm (10.83 inch) longer, 12 mm (0.47 inch) wider and has 225 liters (7.95 ft3) bigger cargo space than Seat Leon (2020).
Seat Leon (2020) is 31 mm (1.22 inch) higher and 139 kg (306 lbs) lighter than BMW 3 Series Touring (2018).