Corn Starch is 75% amylopectin and 25% amylose. Waxy Maize is 100% amylopectin.
When it comes down to it (post workout carbs) it won't make a massive difference if you use Waxy maize, maltodextrin, corn starch or oats, provided you're eating properly.
Im using powdered oats atm - I've been...