Niger vs Nigeria

Niger has no monthly cost data yet; Nigeria has no monthly cost data yet — not enough data to call a winner.

Niger has no safety score data yet; Nigeria has no safety score data yet — not enough data to call a winner.

Niger has no mobility score data yet; Nigeria has no mobility score data yet — not enough data to call a winner.

Niger has no culture score data yet; Nigeria has no culture score data yet — not enough data to call a winner.

Niger's passport reaches 32 destinations visa-free to Nigeria's 25 — Niger 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.

Niger has no annual passenger volume data yet; Nigeria's 13M passengers/yr annual passenger volume (across 2 scored cities) — not enough data to call a winner.

Niger runs 6°C to 46°C for most people; Nigeria runs 21°C to 40°C for most people. Katsina runs colder, at 6°C. Depends on you — which range fits your tolerance is the real question here, not a score.