ΔE 22.9, loose: different enough that you should pick on purpose. Screaming Bell is a little lighter, warmer than Copper.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Screaming Bell is a little lighter, warmer than Copper.
The same difference applies the other way round: Copper is a little darker, 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 Copper on the colour wheel See Screaming Bell on the colour wheel
All matches: Copper equivalents · Screaming Bell equivalents