ΔE 6.6, close: similar, with a visible difference side by side. Luftwaffe Uniform is a little lighter, cooler than Terrestrial Titan.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Luftwaffe Uniform is a little lighter, cooler than Terrestrial Titan.
The same difference applies the other way round: Terrestrial Titan 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 Terrestrial Titan on the colour wheel See Luftwaffe Uniform on the colour wheel
All matches: Terrestrial Titan equivalents · Luftwaffe Uniform equivalents