ΔE 18.8, loose: different enough that you should pick on purpose. Dawnstone is a little darker, much more muted than Demon Red.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Dawnstone is a little darker, much more muted than Demon Red.
The same difference applies the other way round: Demon Red is a little lighter, 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 Demon Red on the colour wheel See Dawnstone on the colour wheel
All matches: Demon Red equivalents · Dawnstone equivalents