Daemonette Hide vs Red Grey

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Red Grey is a little lighter, warmer than Daemonette Hide.

Can I use Red Grey instead of Daemonette Hide?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Red Grey is a little lighter, warmer than Daemonette Hide.

Can I use Daemonette Hide instead of Red Grey?

The same difference applies the other way round: Daemonette Hide 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.