McLaren MP4-12C (2019) is 18 mm (0.71 inch) wider and 799 kg (1,761 lbs) lighter than Mercedes GLC-Class (2015).
Mercedes GLC-Class (2015) is 147 mm (5.79 inch) longer, 460 mm (18.11 inch) higher and has 206 liters (7.27 ft3) bigger cargo space than McLaren MP4-12C (2019).