The body processes sugar compounds differently. Fructose is typically not preferred amongst athletes (bodybuilders, runners, etc). Reasons being Fructose's low absorption and requirement that it be processed by the liver - it needs to be converted to Glucose before the body can even use it. Fructose also lowers physical activity and increases body fat compared to glucose in the same dose and calorie intake.
Bur honey contains some very useful ingredients also, so it's good to have some honey so now and then.
And agave does have a lower glymetic index than table sugar. So that certainly makes a difference.
Also I think that more naturally grown food is in general better and healthier for us compared to artificially / synthatically make food. Because natural processes add a lot more nutritional value to the food than we realize. We keep discovering new things that are in there which we didn't know about before.
Yeah but agave is also a natural product from the agave plant, not artificially made, so it probably contains more useful nutrition, although I guess less than honey. But better than synthetically made anyway.
So no.. all sugars are not equal.