First: Welcome to Rasim! Congrats on your new car. Talk about unique: the only one in the country!!

I've seen a lot of posts on this very subject. The engines are the same between the SLK 32 AMG and the SRT-6. The ONLY difference that I have even read about is someone mentioned that the SLK had larger injectors. I can't confirm or deny this.

But one thing is certain, the SRT-6 and SLK 32 AMG run so close in the 1/4 mile times that they may as well be the same car. So it is incredibly likely that there are no differences in horsepower between the two cars.