HEAD TO HEAD
Spain vs United Kingdom
Verdict
United Kingdom holds a 66–34 advantage over Spain on the Relative Advantage Index, a clear margin.
The margin is driven by military spending (69% of the combined total, $89.0bn) and economic size (GDP) (68% of the combined total, $3.7tn).
1 factor — nuclear warheads — could not be scored because the figure is unpublished for at least one side.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 by factor
| Factor | Spain | Share | United Kingdom | Weight |
|---|---|---|---|---|
Military spending SIPRI Milex | $40.2bn | 31%69% | $89.0bn | 33% |
Economic size (GDP) World Bank WDI | $1.7tn | 32%68% | $3.7tn | 27% |
Active personnel COW NMC | 124.0k | 45%55% | 150.0k | 20% |
Logistics & power projection OurAirports | 107 | 28%72% | 272 | 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 2026-10-22.
