That is a very low curb weight for a twin turbo V8 sports car in this day and age. It undercuts the SLS AMG by roughly ~400 pounds. How is this possible? Well the SLC will be slightly smaller but it is also getting an aluminum frame from an Austrian company named Magna.
Not only will the SLC compete with the Porsche 911 price and performance wise, it will match it pound for pound so to speak. The PDK 991 Carrera S also makes extensive use of aluminum coming in lighter than the 997 Carrera S it replaced at 3,120 pounds. If AMG can get close to the 991 curb weight while offering a twin turbo V8 with a dual clutch transmission and more power/torque, they truly are going to give the Porsche 911 a run for its money.