One has full hips, the other a tummy. Part of that has to do with physique. Unfortunately, that belly fat is really unhealthier than fat elsewhere in the body.
Visceral fat is located around your organs, such as stomach and intestines. It can put pressure on your organs, making them less effective. But there is more: this fat influences the production of hormones. You become less sensitive to insulin, so that your blood sugar level rises and your body has to make more insulin again. Ultimately, this increases the risk of high blood pressure and diabetes.
Finally, this visceral fat is also more active than fat cells on the legs or hips. The belly fat produces inflammatory substances that activate the immune system. That can focus less well on external diseases, because it is already occupied by the belly fat.
Do you have a belly and want to get rid of it? Abdominal exercises do not help. The solution is to eat less and healthier. Make sure you get more fiber and less bad sugars. So more whole grain products and legumes and especially less biscuits, cakes and alcohol.