ΔE 14.4, fair: the same colour family, but not a straight swap. Saddle Brown is a little darker, more saturated than Grau RLM 02.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Saddle Brown is a little darker, more saturated than Grau RLM 02.
The same difference applies the other way round: Grau RLM 02 is a little lighter, more muted.
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 Grau RLM 02 on the colour wheel See Saddle Brown on the colour wheel
All matches: Grau RLM 02 equivalents · Saddle Brown equivalents