ΔE 20.0, loose: different enough that you should pick on purpose. Titan Buff is a little lighter, warmer than Mossy Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Titan Buff is a little lighter, warmer than Mossy Green.
The same difference applies the other way round: Mossy Green is a little darker, cooler.
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 Mossy Green on the colour wheel See Titan Buff on the colour wheel
All matches: Mossy Green equivalents · Titan Buff equivalents