Cambodia vs Vietnam

Cambodia's $887/mo monthly cost (across 2 scored cities); Vietnam's $997/mo monthly cost (across 2 scored cities) — not enough data to call a winner.

Cambodia's 1.1/5 safety score (across 2 scored cities); Vietnam's 1.5/5 safety score (across 2 scored cities) — not enough data to call a winner.

Cambodia's 1.6/5 mobility score (across 2 scored cities); Vietnam's 2.0/5 mobility score (across 2 scored cities) — not enough data to call a winner.

Cambodia's 2.9/5 culture score (across 2 scored cities); Vietnam's 3.2/5 culture score (across 2 scored cities) — not enough data to call a winner.

Cambodia's passport reaches 22 destinations visa-free to Vietnam's 23 — Vietnam 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.

Cambodia has no annual passenger volume data yet; Vietnam's 117M passengers/yr annual passenger volume (across 12 scored cities) — not enough data to call a winner.

Cambodia runs 21°C to 41°C for most people; Vietnam runs 19°C to 39°C for most people. Móng Cái runs colder, at 1°C. Depends on you — which range fits your tolerance is the real question here, not a score.