The basic point is that added sugar is bad in general, but HFCS is worse. High fructose content is bad. They used to put pure, crystalline fructose in drinks like Sobe for example. It always made me feel a little off. I have heard that HFCS has a little bit of mercury in it too, which is really, really bad. You should be consuming no mercury at all, especially if it's a simple choice between A and B without much of a difference in the experience created by the two.