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Neither.  Duplicate content is not a punishment. It is a relevance issue. Google simply thinks the duplicate site is a clone of many sites and there irrelevant. Some sites with greater authority it does work for - but google will only pick one site to display. Hence the other site considers it a punishment as they have the same content - but not displayed. Think of it in fashion, people do not usually line of for mass market product, they line up for the limited edition. Google does not want to show mass market, the same thing over and over again - it wants to show unique relevant content.