Fire Giant Orange vs Magmadroth Flame

How close are they?

ΔE 9.8, close: similar, with a visible difference side by side. Magmadroth Flame is cooler than Fire Giant Orange.

Can I use Magmadroth Flame instead of Fire Giant Orange?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Magmadroth Flame is cooler than Fire Giant Orange.

Can I use Fire Giant Orange instead of Magmadroth Flame?

The same difference applies the other way round: Fire Giant Orange is 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.