Home » 2015 Porsche 911 GT3 R vs. GT3 Cup vs. GT3 RSR – Visual and Specs Comparison » 2015 Porsche 991 GT3 R 7 2015 Porsche 991 GT3 R 7 Home » 2015 Porsche 911 GT3 R vs. GT3 Cup vs. GT3 RSR – Visual and Specs Comparison » 2015 Porsche 991 GT3 R 7