CUDA vs. OpenCL GPGPU Performance On NVIDIA's Pascal

Following yesterday's Deep Learning and CUDA Benchmarks On The GeForce GTX 1080 Under Linux one of the Phoronix reader inquiries was about the OpenCL vs. CUDA performance on the GTX 1080... Is one GPGPU compute API faster than the other with NVIDIA's proprietary driver? Here are some side-by-side benchmarks...