Here's a breakdown of the key differences between the two images:

*   **Person:** The original image shows a younger man, while the synthetic image depicts an older, more muscular man.
*   **Surfboard Position:** In the original, the surfer is walking and holding the board upright. In the synthetic version, he's carrying it over his shoulder.
*   **Board Details:** The synthetic image has more visible details on the surfboard (logos, fin plugs).
*   **Body Features:** The synthetic image shows more defined muscle definition on the man’s body.
*   **Background Detail:** The synthetic image has slightly sharper background detail compared to the blurred background of the original.