Cadillac STS (2017) is 588 mm (23.15 inch) longer, 161 mm (6.34 inch) higher and has 203 liters (7.17 ft3) bigger cargo space than Toyota GR Supra (2018).
Toyota GR Supra (2018) is 26 mm (1.02 inch) wider and 130 kg (287 lbs) lighter than Cadillac STS (2017).