ΔE 8.4, close: similar, with a visible difference side by side. Aged Metal is a little darker, warmer than Electrum.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Aged Metal is a little darker, warmer than Electrum.
The same difference applies the other way round: Electrum is a little lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Electrum on the colour wheel See Aged Metal on the colour wheel
All matches: Electrum equivalents · Aged Metal equivalents