Demigod Flames vs Orange Flare

How close are they?

ΔE 15.1, loose: different enough that you should pick on purpose. Orange Flare is a little lighter, more saturated, cooler than Demigod Flames.

Can I use Orange Flare instead of Demigod Flames?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Orange Flare is a little lighter, more saturated, cooler than Demigod Flames.

Can I use Demigod Flames instead of Orange Flare?

The same difference applies the other way round: Demigod Flames is a little darker, more muted, 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.