There: what is the difference between congestive heart failure and coronary artery disease in a diabetic?

CHF. Is typically caused by a weakened heart muscle or one that "relaxes" poorly whereas CAD is caused by cholesterol plaques in coronary arteries. Frequently CAD is present with chf. Diabetics are at great risk for getting cad.
CAD CHF. CAD is narrowed arteries of the heart, may cause heart attack, which may cause heart to get weak & not pump well causing heart failure. In heart failure you retain fluid and makes it hard to you to function (get fatigue easily, may get another heart attack or shortness of breath. Diabetes makes you more prone to have CAD and chf.