Cadillac STS (2017) is 588 mm (23.15 inch) longer, 34 mm (1.34 inch) wider, 160 mm (6.30 inch) higher and has 226 liters (7.98 ft3) bigger cargo space than Porsche Cayman (2014).
Porsche Cayman (2014) is 354 kg (780 lbs) lighter than Cadillac STS (2017).
