45However, primary EU law cannot guarantee to a worker that moving 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’ social security 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). EU law guarantees only that workers active in a Member State other than their Member State of origin are subject to the same conditions as workers of that other State.
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