ΔE 8.0, close: similar, with a visible difference side by side. RLM 79 Sand Yellow is a little darker than Monster Brown.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). RLM 79 Sand Yellow is a little darker than Monster Brown.
The same difference applies the other way round: Monster Brown 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 Monster Brown on the colour wheel See RLM 79 Sand Yellow on the colour wheel
All matches: Monster Brown equivalents · RLM 79 Sand Yellow equivalents