Bulgaria vs Greece

Bulgaria's $1,215/mo monthly cost (across 2 scored cities); Greece's $1,468/mo monthly cost (across 8 scored cities) — not enough data to call a winner.

Bulgaria's 2.6/5 safety score (across 2 scored cities); Greece's 1.8/5 safety score (across 8 scored cities) — not enough data to call a winner.

Bulgaria's 2.4/5 mobility score (across 2 scored cities); Greece's 2.8/5 mobility score (across 60 scored cities) — not enough data to call a winner.

Bulgaria's 2.1/5 culture score (across 2 scored cities); Greece's 3.5/5 culture score (across 8 scored cities) — not enough data to call a winner.

Bulgaria's passport reaches 102 destinations visa-free to Greece's 105 — Greece 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.

Greece is better connected: 77M passengers/yr against Bulgaria's 12M passengers/yr. Bulgaria is quieter than 59 of 87 countries worldwide; Greece is busier than 62 of 87 countries worldwide. Bulgaria sees ~2 air passengers per resident a year; Greece sees ~7 air passengers per resident a year — a derived figure, not itself ranked.

Bulgaria runs -12°C to 34°C for most people; Greece runs -6°C to 37°C for most people. Alexandroupoli runs colder, at -14°C. Depends on you — which range fits your tolerance is the real question here, not a score.