A Redditor is claiming manufacturing differences in Noctua fans depending on which factory (Taiwan or China) they originate from, but tests by GamersNexus show that these accusations are false: any variances appear to be insignificant and well within the margin of error. In fact, the only real inconsistency may merely be slight differences in color.
Posting a concern about a product, like Reddit user Kendalf did, cannot be praised enough. This type of alert gets attention from manufacturers and media alike, and means that we can all work together to determine if, (1) there is actually an issue, and (2) how we can fix it or work around it. The result is stronger products, hopefully. As stated in the lengthy conclusion, though, it’s an unfortunate side effect that other commenters then elect to blow things out of proportion for need to feel upset about something.
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Source: [H]ardOCP – Noctua’s Alleged Manufacturing Discrepancies Put to the Test