Brazil vs French Guiana

Brazil's $1,414/mo monthly cost (across 7 scored cities); French Guiana has no monthly cost data yet — not enough data to call a winner.

Brazil's 0.9/5 safety score (across 7 scored cities); French Guiana has no safety score data yet — not enough data to call a winner.

Brazil's 2.7/5 mobility score (across 7 scored cities); French Guiana has no mobility score data yet — not enough data to call a winner.

Brazil's 3.9/5 culture score (across 7 scored cities); French Guiana has no culture score data yet — not enough data to call a winner.

Brazil's passport reaches 112 destinations visa-free; French Guiana has no passport baseline yet. Not scored in the tally.

Brazil's 174M passengers/yr annual passenger volume (across 15 scored cities); French Guiana has no annual passenger volume data yet — not enough data to call a winner.

Brazil runs 13°C to 35°C for most people; French Guiana runs 23°C to 37°C for most people. Pelotas runs colder, at 0°C. Depends on you — which range fits your tolerance is the real question here, not a score.