BMW i8 (2017) is 27 mm (1.06 inch) wider and 320 kg (705 lbs) lighter than Maserati GranTurismo (2015).
Maserati GranTurismo (2015) is 244 mm (9.61 inch) longer, 53 mm (2.09 inch) higher and has 107 liters (3.78 ft3) bigger cargo space than BMW i8 (2017).