A calorie is a calorie.  The problem is that your body can digest sugar more rapidly than it can vegetables, causing it to store the excess.  If you didn't eat anything else and stuck to the correct number of calories for the day, it would burn them right back off.  However, fatasses can't put down the fork for two seconds, so they continue to eat throughout the day and raise their calorie count to ten times what they eat since they're stuffing their gaping maws with calorie dense foods. It's not the fault of the food.  It's the pigs that are going over their caloric limits.