Tips for avoiding this issue:
- Use the loupe when comparing master and version.
- Toggle the image to 100 percent (Z key) to check actual sharpness.
- Resize the Viewer until you find a size at which the difference between master and version is minimized.
- Try full-screen mode. Depending on the size of your screen, the difference may not even be noticeable.
To learn more about the relationship between sharpness and scaling, see Sharpness not apparent at less than 100 percent.