Both are converted to sugar the instant they hit the liver.
What you want are carbs wrapped up in indigestible fiber ~ in LOW GLYCEMIC INDEX foods. If you work it right you'll get all you need to chew on PLUS your carb budget will be minimized.
I've identified 17 different vegetables I can eat in vast quantities (if I wished, which I don't, although my dentist tells me they are very good for him).
Some folks have PRE AGRICULTURE digestive systems and metabolism. They obviously tend toward the carnivore end of the food pyramid. Other people (apparantly about 95%) are mutants and can eat wheat, corn, hybridized fruit and so forth without difficulty.