While the OTC and the HF stands may both be manufactured in China, If you examined the two, you would easily see differences. The OTC stands, I'll be, don't know, haven't seen them, are probably one or two gauges of steel heavier than the HF ones. I have four Snap-On 3 ton stands, made in China, but are much heavier steel than identical looking one in the auto parts places. The risers are probably somewhat better quality also, the look of the cast iron on my SO stands is quite nice, and even, compared to the cheapies I have looked at. Lastly, the welding is much better quality and more of it, than the cheap ones. You DO get a better stand when you pay more for them.
Charles