37However, primary EU law cannot guarantee to a worker that the move to a Member State other than his Member State of origin will be neutral in terms of social security, since, given the disparities between the Member States’ schemes and legislation, such a move may be more or less advantageous for the person concerned in that regard (judgment of 18 July 2017, Erzberger, C‑566/15, EU:C:2017:562, paragraph 34 and the case-law cited).
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