The difference is in shape only. The Baby Pressure Cooker is suited for single persons, small servings or new mothers who are introducing solid food to their babies. The Broad range of Xpress Cookers is suited for inserts while the pan is made in the shape of a pan with lesser height, more suitable to use for sautés and stir fries. All Xpress Cookers can be used as pans before or aside of pressure cooking.