This is one of the most annoying openings to a sentence you could device, just fyi
As to the why. (With the premise that the comment you're replying to is overstating it)
An open border is pretty irrelevant to all of the above, more relevant is that both are in the EU. So you can somewhat imagine them as US states on steroids. They set their own taxes with a large degree of freedom, devise their own policies with a large degree of freedom etc
- energy costs are a factor of market price and taxes, the electricity market is the same but taxes on energy can impact differently
- land costs are fully dependent on factors that have nothing to do with open borders or the EU, just local/national taxes and zoning etc
- water supply depends on the geography/geology of the area. I don't know if they're that different but I don't see why they couldn't be
This is one of the most annoying openings to a sentence you could device, just fyi
As to the why. (With the premise that the comment you're replying to is overstating it)
An open border is pretty irrelevant to all of the above, more relevant is that both are in the EU. So you can somewhat imagine them as US states on steroids. They set their own taxes with a large degree of freedom, devise their own policies with a large degree of freedom etc
- energy costs are a factor of market price and taxes, the electricity market is the same but taxes on energy can impact differently - land costs are fully dependent on factors that have nothing to do with open borders or the EU, just local/national taxes and zoning etc - water supply depends on the geography/geology of the area. I don't know if they're that different but I don't see why they couldn't be