ΔE 11.5, fair: the same colour family, but not a straight swap. Yellow Dune is a little darker, cooler than RLM 79 (1941).
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Yellow Dune is a little darker, cooler than RLM 79 (1941).
The same difference applies the other way round: RLM 79 (1941) is a little lighter, 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.
See RLM 79 (1941) on the colour wheel See Yellow Dune on the colour wheel
All matches: RLM 79 (1941) equivalents · Yellow Dune equivalents