ΔE 9.4, close: similar, with a visible difference side by side. Yellow RLM04 is a little darker than Yellow Flame.
Usually, if you are not matching paint already on the model. Close match (ΔE 9). Yellow RLM04 is a little darker than Yellow Flame.
The same difference applies the other way round: Yellow Flame 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 Yellow Flame on the colour wheel See Yellow RLM04 on the colour wheel
All matches: Yellow Flame equivalents · Yellow RLM04 equivalents