Citroen C-Elysee (2017) is 64 mm (2.52 inch) longer, 153 mm (6.02 inch) higher, 310 kg (683 lbs) lighter and has 344 liters (12.15 ft3) bigger cargo space than Porsche Cayman (2014).
Porsche Cayman (2014) is 52 mm (2.05 inch) wider than Citroen C-Elysee (2017).