DNA Tribes is correct that siblings can and do have very diverse DNA. Your autosomal DNA is a random subset of your mother's and father's DNA (50% from each parent). Two siblings will not have the same results for the same reason that they do not look exactly the same. They do not get the exact same 50% from each parent. Even identical twins don't have exactly the same DNA (only almost exactly the same).
Calorie and Nutrition information for popular products from Steak n Shake: Per 1 shake - Calories: 380kcal | Fat: 12.00g | Carbs: 63.00g | Protein: 11.00g. Per 1 shake - Calories: 890kcal | Fat: 29.00g | Carbs: 140.00g | Protein: 25.00g. Per 1 shake - Calories: 700kcal | Fat: 23.00g | Carbs: 111.00g | Protein: 18.00g.
There are an estimated 798 calories in a 1 pound serving of beef  chuck steak. In this serving size there are 47.7 grams of fat and 0  grams of carbohydrates.