The Porsche 911 GT3 RS is an even more track-focused version of the GT3 that renounces most of the parts that are not necessary for racing. It is based on the naturally aspirated Carrera while putting out a power that is more similar to the one of a 911 Turbo. The GT3 RS does not have the rear seats a Carrera would have but instead, it usually has a roll cage. For the latest generation GT3 RS (991), Porsche made more daily use possible. You can have a lift system, navigation system and leather travelling seats. The Porsche 911 GT3 Cup and the GT3 RSR are both race cars that are based on the 911 GT3 RS.