17:54 08/9/2024 Difference between fat and muscle volume 0 (0) The actual volume difference is about 30%. The reason the fat looks more noticeable is because the flesh is flowing out. Muscle supports the skeleton, but fat does not. How useful was this post? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this post.