ΔE 7.2, close: similar, with a visible difference side by side. Cavalry Brown is a little lighter, cooler than Red Rage.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Cavalry Brown is a little lighter, cooler than Red Rage.
The same difference applies the other way round: Red Rage is a little darker, 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 Cavalry Brown on the colour wheel
All matches: Red Rage equivalents · Cavalry Brown equivalents