ΔE 7.3, close: similar, with a visible difference side by side. Typhon Ash is a little darker, more muted than RLM 02 RLM-Grau (1938).
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Typhon Ash is a little darker, more muted than RLM 02 RLM-Grau (1938).
The same difference applies the other way round: RLM 02 RLM-Grau (1938) is a little lighter, more saturated.
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 02 RLM-Grau (1938) on the colour wheel See Typhon Ash on the colour wheel
All matches: RLM 02 RLM-Grau (1938) equivalents · Typhon Ash equivalents