I am sure you meant to say US$20.
I think it worth as it is Modular, while the XFX is Semi-Modular.
Semi-modular here means that the cables that will be used in absolutely every build (the mobo, CPU and two PCIe power cables) are not modular, and everything else is. It's no different from a fully modular PSU when used in a build. My price difference refers to the cost after rebates.