BMW 1 Series (2015) is 25 mm (0.98 inch) wider and 15 kg (33 lbs) lighter than Subaru Impreza GP (2014).
Subaru Impreza GP (2014) is 86 mm (3.39 inch) longer, 49 mm (1.93 inch) higher and has 25 liters (0.88 ft3) bigger cargo space than BMW 1 Series (2015).