Algeria vs Nigeria

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

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

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

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

Algeria's passport reaches 24 destinations visa-free to Nigeria's 25 — Nigeria 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.

Nigeria is better connected: 13M passengers/yr against Algeria's 13M passengers/yr. Algeria is quieter than 58 of 87 countries worldwide; Nigeria is quieter than 54 of 87 countries worldwide. Algeria sees ~30 air passengers per 100 residents a year; Nigeria sees ~7 air passengers per 100 residents a year — a derived figure, not itself ranked.

Algeria runs -3°C to 41°C for most people; Nigeria runs 21°C to 40°C for most people. Adrar runs hotter, at 53°C; Katsina runs colder, at 6°C. Depends on you — which range fits your tolerance is the real question here, not a score.