ΔE 18.6, loose: different enough that you should pick on purpose. Copper is a little lighter, much more muted than Red Queen.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Copper is a little lighter, much more muted than Red Queen.
The same difference applies the other way round: Red Queen is a little darker, much more saturated.
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 Red Queen on the colour wheel See Copper on the colour wheel
All matches: Red Queen equivalents · Copper equivalents