What I know is that fasting is intentional while starving is not. Therefore, should there be pain it is often during starving but not during fasting. This is so because, with fasting the mind and body are prepared and made away that there is going to be no food for a while while with starving, it is usually due to lack of availability of food when the tummy needs it there by sending signals to the brain for interpretation which leads to pains.

Your article enlightened me and I'm glad I read it. Good work @suesa