Ireland vs Spain

Spain is cheaper: $1,852/mo against Ireland's $2,616/mo. Ireland is pricier than 35 of 41 European countries; Spain is pricier than 22 of 41 European countries.

Spain is safer: 2.8/5 against Ireland's 2.7/5. Ireland is less safe than 25 of 41 European countries; Spain is less safe than 24 of 41 European countries.

Spain scores higher on mobility: 3.2/5 against Ireland's 2.7/5. Ireland is harder to get around than 29 of 41 European countries; Spain is easier to get around than 25 of 41 European countries.

Ireland scores higher on culture: 3.9/5 against Spain's 3.9/5. Ireland is richer in culture than 34 of 41 European countries; Spain is richer in culture than 31 of 41 European countries.

Ireland's passport reaches 104 destinations visa-free to Spain's 105 — Spain opens more doors without a visa. Passport strength shifts over years of naturalisation, not months of planning, so it's a long-horizon footnote — not scored in the tally.

Spain is better connected: 315M passengers/yr against Ireland's 42M passengers/yr. Ireland is busier than 53 of 87 countries worldwide; Spain is busier than 83 of 87 countries worldwide. Ireland sees ~9 air passengers per resident a year; Spain sees ~7 air passengers per resident a year — a derived figure, not itself ranked.

Ireland runs -13°C to 23°C for most people; Spain runs -5°C to 35°C for most people. Depends on you — which range fits your tolerance is the real question here, not a score.