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

*   **Shirt Color:** The original image shows a dark green shirt, while the synthesized image depicts a darker olive/grey shirt.
*   **Facial Expression:** The man in the original image appears to be looking down or away, whereas the man in the synthesized version looks directly at the camera.
*   **Glasses:** The glasses appear different in shape and thickness.
*   **Background Details:** The background details differ slightly including the placement of pillows and the lighting.