Cayman / Cayman S

Hello to the forum, I’m thinking about getting a Cayman S. Now the “normal” Cayman is much cheaper, but also has less horsepower. Question: Can’t you buy the cheaper Cayman and let the missing 50 hp – or even more – “remove” by inserting into the engine? I’m not a screwdriver, but can’t imagine that there should really be 2 completely own engines at work.