Busan logs 2 hot days a year to Seoul's 38 — Busan wins by 36. Busan also leads on frost days by 83.

Busan runs about $1,441/mo for a balanced lifestyle against Seoul's $1,853/mo — Busan comes in $412 cheaper each month, roughly 29% less.

On mobility, Seoul scores 4.6 vs Busan's 3.6 (0–5 scale), with the biggest gap on flight connectivity. Busan still holds an edge on car efficiency.

Seoul's culture score of 3.1 sits well above Busan's 2.5, with the biggest gap on history museums.

Busan and Seoul score neck-and-neck on nature & outdoors (4.5 vs 4.3, 0–5 scale).

Busan and Seoul score neck-and-neck on safety (3.9 vs 4.1, 0–5 scale).

Seoul's career score of 4.3 sits well above Busan's 3.1, with the biggest gap on economic scale.

Seoul's social & community score of 2.8 sits well above Busan's 2.6, with the biggest gap on urban energy. Busan still holds an edge on multicultural mix.

On food & dining, Seoul scores 4.0 vs Busan's 3.6 (0–5 scale), with the biggest gap on brunch availability. Busan still holds an edge on restaurant variety.

On family, Seoul scores 4.1 vs Busan's 3.4 (0–5 scale), with the biggest gap on international schools.

On healthcare, Seoul scores 4.1 vs Busan's 3.7 (0–5 scale), with the biggest gap on private healthcare quality. Busan still holds an edge on public healthcare quality.

Busan averages 17.8 µg/m³ (sensitive-groups) PM2.5 annually versus Seoul's 26.6 µg/m³ (unhealthy) — Busan breathes ~33% cleaner air (8.8 µg/m³ lower).

Who Thrives Here