It sounds like an urban legend used to justify an apparent pricing discrepancy in the market to me. Because you know... If the same drive is being sold at two different price points, the cheaper one that also comes with and enclosure must be inferior in some way.someone was mentioning it in another thread in the past. I think it had to do mostly with platters and how the drive performed but it was a while ago and i didn't pay close attention to it since it wasn't something important to me. I don't buy externals so.