ΔE 20.4, loose: different enough that you should pick on purpose. Militarum Green is noticeably lighter, warmer than Absolution Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Militarum Green is noticeably lighter, warmer than Absolution Green.
The same difference applies the other way round: Absolution Green is noticeably 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 Absolution Green on the colour wheel See Militarum Green on the colour wheel
All matches: Absolution Green equivalents · Militarum Green equivalents