Eurostat prices the same basket of everyday life in every country and sets the EU average at 100. Above it, life is dearer; below it, cheaper. Ireland is the anchor, pick any other country, or any slice of life, and the exhibit re-argues itself.
Source: Eurostat Price Level Indices ↗ (prc_ppp_ind), 2024, EU27 = 100. 39 countries, 10 categories. Figures baked in and verified against the published table.