ΔE 8.0, close: similar, with a visible difference side by side. RLM 02 Gray is a little lighter, more muted than Prairie Ochre.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). RLM 02 Gray is a little lighter, more muted than Prairie Ochre.
The same difference applies the other way round: Prairie Ochre is a little darker, 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 Prairie Ochre on the colour wheel See RLM 02 Gray on the colour wheel
All matches: Prairie Ochre equivalents · RLM 02 Gray equivalents