Choosing Between Bagel and Croissant - as part of the expert series by GeoBeats. My name is Kate Fortunado with Rebecca Bitzer and Associates. When choosing between a bagel and a croissant, there are certain things to consider. Both bagels and croissants are high in carbohydrates, which out bodies need in moderation for energy. Croissants however; contain more calories and fat than a bagel. My favorite breakfast would be a whole wheat bagel with peanut butter or an egg for some added protein.