Australia and Spain are close to evenly matched, 49–51 on the Relative Advantage Index.
Australia leads on economic size (GDP) (50% of the combined total, $1.8tn) and logistics & power projection (67% of the combined total, 213), which Spain offsets elsewhere.
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side. Those factors are excluded and the remaining weights renormalised, never substituted.
| Factor | Australia | Share | Spain | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $35.3bn | 47%53% | $40.2bn | 33% |
Economic size (GDP) World Bank WDI | $1.8tn | 50%50% | $1.7tn | 27% |
Active personnel COW NMC | 60.0k | 33%67% | 124.0k | 20% |
Logistics & power projection OurAirports | 213 | 67%33% | 107 | 20% |
Shares are each side's portion of the combined total for that factor. Weights are renormalised across the factors both sides publish — see the methodology. Data read 2026-08-04.
Every combination inside the top 30 of the Composite Power Index.
Bordering states — the comparisons people actually search for.