Chad vs Nigeria

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

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

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

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

Chad's passport reaches 26 destinations visa-free to Nigeria's 25 — Chad 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.

Chad 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.

Chad runs 11°C to 45°C for most people; Nigeria runs 21°C to 40°C for most people. Amdjarass runs colder, at -4°C; Katsina runs colder, at 6°C. Depends on you — which range fits your tolerance is the real question here, not a score.