Auric Armour Gold vs El Dorado

How close are they?

ΔE 19.8, loose: different enough that you should pick on purpose. El Dorado is a little lighter, much more saturated, warmer than Auric Armour Gold.

Can I use El Dorado instead of Auric Armour Gold?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). El Dorado is a little lighter, much more saturated, warmer than Auric Armour Gold.

Can I use Auric Armour Gold instead of El Dorado?

The same difference applies the other way round: Auric Armour Gold is a little darker, much more muted, 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.