Michelobe ultra has 2.6, and miller light has only 3.2. Michelobe is just smarter for fooling people into thinking that their beer is healty.
When you injest alcohol, your body resorts to useing the alcohol in your system for fuel. All carbs fat and protein in your system go unused and end up getting stored as fat. Alcohol has a priority of being burned first before any carbs or fat are used. So basicly anything you eat while drunk gets stored as fat.
One pottential good thing about alcohol, is that it lowers the ammount of fat that your digestive system could absorb.