Sugar is an odd substance. It's made up of glucose and fructose. Glucose tells your body to store fat and "use me" while your liver is converting the fructose to fat.
But yeah, it's all sucrose except for 'dextro energy' (glucose==grape sugar) or baking.
http://www.bodyrecomposition.com/fat-loss/how-we-get-fat.htm...
http://www.bodyrecomposition.com/fat-loss/the-fundamentals-o...
http://www.bodyrecomposition.com/fat-loss/the-fundamentals-o...
In case you like his writing, he's the author of a couple of high quality books.
So cutting down on the sugar should tell the body to use more fat as an energy source, yes?
Actually, he answers that almost directly here:
http://www.bodyrecomposition.com/nutrition/nutrient-intake-n...