Why do some muscular men have different chest muscles?

The figure above shows that the body fat of the square chest is below 5%, and the figure below shows that the body fat of the splayed chest is around 10%, and the chest muscles are naturally shaped. The square chest is obviously stylish without training, but the thickness will not break through. When the chest fat is thick, it is like two drooping water bags, but as long as it is thick, it is like hanging two biscuits on the chest (refer to Schwarzenegger), which is more masculine.