Different driving behaviour and road position 997 S Coupe / Cabrio

Hello, I have a question. I bought a 997 S Cabrio FL 3 weeks ago. The vehicle has PASM + Sport Chrono. Today I had a rental balance from the car dealership. Actually almost the same as mine only as Coupe and in the not S version (also PASM + Sport Chrono). Of course this with 305 instead of the 295 at the Cabrio. Now I have (for my actually few driving runs with Porsche) determined that driving behavior is very different from the chassis. rio is more unstable and you can’t drive so aggressively in the curves. I find a understeer in the curves, so read the stability would be missing. Now the question arises me if with my convertible ex factory what is wrong, or if this is generally true. Is there possibly someone here who with more driving experience already had the opportunity to test on vehicles? Thank you for your help. Sevvi