ΔE 6.8, close: similar, with a visible difference side by side. Mars Yellow is a little darker than Fire Drake. They are different kinds of paint: Army Painter Fire Drake is a one-coat contrast-style paint and Golden Mars Yellow is an opaque base/layer paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Mars Yellow is a little darker than Fire Drake. They are different kinds of paint.
The same difference applies the other way round: Fire Drake is a little lighter.
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 Fire Drake on the colour wheel See Mars Yellow on the colour wheel
All matches: Fire Drake equivalents · Mars Yellow equivalents