This post/query raises an interesting more general point.
Some companies sell a range of one-size-fits-all power cords, only differentiated by construction and price.
Others sell power cords designed for higher power and lower power applications; sometimes there are different "versions" of what is otherwise the same model. Almost always, the high power versions are constructed with smaller awg (i.e. thicker) wire.
So, who is right? If some companies believe the same awg is more than adequate for all applications, are other companies just taking advantage of the situation to charge more for more copper (or whatever). Or...?