ΔE 28.1, loose: different enough that you should pick on purpose. Copper is noticeably darker, cooler than Victorian Brass.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 28). Copper is noticeably darker, cooler than Victorian Brass.
The same difference applies the other way round: Victorian Brass is noticeably lighter, warmer.
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 Victorian Brass on the colour wheel See Copper on the colour wheel
All matches: Victorian Brass equivalents · Copper equivalents