ΔE 8.1, close: similar, with a visible difference side by side. Brown RLM26 is a little lighter, more saturated, cooler than Red Rage.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Brown RLM26 is a little lighter, more saturated, cooler than Red Rage.
The same difference applies the other way round: Red Rage is a little darker, more muted, 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 Red Rage on the colour wheel See Brown RLM26 on the colour wheel
All matches: Red Rage equivalents · Brown RLM26 equivalents