Indonesia vs South Korea

Indonesia has no monthly cost data yet; South Korea's $1,441/mo monthly cost (across 3 scored cities) — not enough data to call a winner.

Indonesia's 1.2/5 safety score (across 1 scored city); South Korea's 4.1/5 safety score (across 3 scored cities) — not enough data to call a winner.

Indonesia's 1.8/5 mobility score (across 1 scored city); South Korea's 4.5/5 mobility score (across 3 scored cities) — not enough data to call a winner.

Indonesia's 3.5/5 culture score (across 1 scored city); South Korea's 3.0/5 culture score (across 3 scored cities) — not enough data to call a winner.

Indonesia's passport reaches 38 destinations visa-free to South Korea's 123 — South Korea 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, South Korea is better connected — 150M passengers/yr vs 49M passengers/yr. Indonesia is busier than 56 of 87 countries worldwide; South Korea is busier than 73 of 87 countries worldwide. Indonesia sees ~18 air passengers per 100 residents a year; South Korea sees ~3 air passengers per resident a year — a derived figure, not itself ranked.

Indonesia runs 24°C to 36°C for most people; South Korea runs -19°C to 35°C for most people. Depends on you — which range fits your tolerance is the real question here, not a score.