Those look like 'pint in a bar' prices, not packaged. In my experience, the North is a little more expensive in general, but not significantly. Specific thing

Those look like 'pint in a bar' prices, not packaged. In my experience, the North is a little more expensive in general, but not significantly. Specific things are different, you definitely want to buy diesel in the South, but even that spread is narrowing. Liquor wise, the both the north and south are at ~$30 for a mass premium bottle of spirits (absolute), and I've seen the same in Germany for ~$14. There's a reason all the Irish come back from holidays with full trunks.