I prefer UCAN super starch over waxy maize. Waxy maize is "claimed" to absorb much faster than dextrous or maltodextrin but research has proven this to be incorrect. In fact some research even points to WM as being a very poor carb to use pre, during, or post training. The good news is that you blood glucose levels will be lower than the more popular dextrous and maltodextrin.
In my opinion super starch is superior to waxy maize from the scientific stand point. I am not suggesting WM will not restore muscle glycogen. I am just stating the information available does not prove it to be more effective than anything else in this regard.
Starches in general do not assist in the absorptions of other nutrients that it would be noticeable by the user. Carbs serve a specific purpose in the body- fuel for the brain and muscle energy storage and I have never came across any information concerning it assisting in other nutrient(s) uptake or assisting in absorption that it could be considered relevant.
I am no expert but I just wanted to share the little that I know about the subject.