Is the Nikon 200-500mm f/5.6E AF-S VR Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 500mm f/5.6 test image. Observe the contrast and resolution of these results.
Is the Nikon 200-500mm f/5.6E AF-S VR Lens set to 500mm f/5.6 sharper than the Sony FE 200-600mm F5.6-6.3 G OSS Lens set to 600mm f/11.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.