BMW 3 Series Gran Turismo (2014) is 456 mm (17.95 inch) longer, 29 mm (1.14 inch) wider, 48 mm (1.89 inch) higher and has 250 liters (8.83 ft3) bigger cargo space than Seat Leon (2020).
Seat Leon (2020) is 120 kg (265 lbs) lighter than BMW 3 Series Gran Turismo (2014).