Turkey is generally lower in saturated fat than beef so it is a better choice for heart health. Ground turkey is available in several lean-to fat ratios that determine its nutritional content, some of which contain more dark meat and therefore are not as lean as the leanest ground beef. If you choose the leanest ground beef which is about 93 percent lean, and choose the leanest ground turkey which is also 93 percent lean, you might be surprised to learn they come up pretty even in protein, and fat.  When it comes to saturated fat, however, turkey wins.  So, if you are purchasing ground turkey to cut calories, be sure to check the Nutritional Label or you could be defeating the purpose.