Belgium vs Spain

Between the two, Spain is cheaper — $1,852/mo vs $2,622/mo. Belgium is pricier than 36 of 41 European countries; Spain is pricier than 22 of 41 European countries.

Between the two, Belgium is safer — 3.2/5 vs 2.8/5. Belgium is safer than 21 of 41 European countries; Spain is less safe than 24 of 41 European countries.

Between the two, Spain scores higher on mobility — 3.2/5 vs 3.1/5. Belgium is easier to get around than 24 of 41 European countries; Spain is easier to get around than 25 of 41 European countries.

Between the two, Spain scores higher on culture — 3.9/5 vs 3.7/5. Belgium is richer in culture than 26 of 41 European countries; Spain is richer in culture than 31 of 41 European countries.

Belgium's passport reaches 106 destinations visa-free to Spain's 105 — Belgium 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.

Between the two, Spain is better connected — 315M passengers/yr vs 34M passengers/yr. Belgium is busier than 44 of 87 countries worldwide; Spain is busier than 83 of 87 countries worldwide. Belgium sees ~3 air passengers per resident a year; Spain sees ~7 air passengers per resident a year — a derived figure, not itself ranked.

Belgium runs -13°C to 30°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.