You get what you pay for. The Model TRUE480 has better specifications all around and would appear to be a more robust design. You'll note that on the Model W0013, several items are marked "not specified", which means they probably don't want you to know, or don't have good things to tell you. Since the Power Supply is the heart of your PC, I'd spend the extra money.

The Antec is definitely a higher quality unit, but if funds are restrictive then the Thermaltake could be considered adequate. Thermaltake PSUs are not low quality, that's for sure. they're just not as good as the Antec ones. Reliability and stable performance comes at a cost, I'm afraid, and the higher the cost the more you can expect to be able to rely on them.