Is the Tamron 28-200mm f/2.8-5.6 Di III RXD Lens sharp? This page visually answers that question. Shown above are 100% crops from a lab-captured 50mm f/3.5 test image. Observe the contrast and resolution of these results.
Is the Tamron 28-200mm f/2.8-5.6 Di III RXD Lens set to 50mm f/3.5 sharper than the Sony FE 24-240mm F3.5-6.3 OSS Lens set to 24mm f/8.0? The image quality comparison above also answers that question. Switch between the results to see the sharpness differences between these lenses.