ΔE 25.6, loose: different enough that you should pick on purpose. Gold Yellow is a little lighter, more saturated, warmer than Demon Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 26). Gold Yellow is a little lighter, more saturated, warmer than Demon Red.
The same difference applies the other way round: Demon Red is a little darker, 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.
See Demon Red on the colour wheel See Gold Yellow on the colour wheel
All matches: Demon Red equivalents · Gold Yellow equivalents