Is the Canon RF-S 14-30mm F4-6.3 IS STM PZ Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 14mm f/4.0 test image. Observe the contrast and resolution of these results.
Is the Canon RF-S 14-30mm F4-6.3 IS STM PZ Lens set to 14mm f/4.0 sharper than the Canon RF 85mm F1.2 L USM Lens set to 85mm f/5.6? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.