Italy holds a 57–43 advantage over Spain on the Relative Advantage Index.
The margin is driven by military spending (54% of the combined total, $48.1bn) and economic size (GDP) (58% of the combined total, $2.4tn).
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side.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 | Italy | Share | Spain | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $48.1bn | 54%46% | $40.2bn | 33% |
Economic size (GDP) World Bank WDI | $2.4tn | 58%42% | $1.7tn | 27% |
Active personnel COW NMC | 161.0k | 56%44% | 124.0k | 20% |
Logistics & power projection OurAirports | 152 | 59%41% | 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.