The issue here is consuming fructose and sucrose. Organic or not won't factor in.
The issue with sugar is how the body processes fructose and glucose. Unless there is indication that substances present in non-organic vs organic sugar modify digestion of sucrose and fructose there isn't much to the theory organic makes sugar less harmful.
Processed white sugar has a detrimental effect on the body, and unprocessed sugar does not. Or if it does, it's so minimal as to be unnoticeable in my own tests.
This includes ability to concentrate, lethargy, dental health, sleep, hyperactivity and general health like colds and the flu.
This is from my own experimentation with multiple people, first hand, not just reading what others have said.