ΔE 33.8, loose: different enough that you should pick on purpose. Army Green is noticeably lighter, more muted, warmer than Warpstone Glow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 34). Army Green is noticeably lighter, more muted, warmer than Warpstone Glow.
The same difference applies the other way round: Warpstone Glow is noticeably darker, more saturated, 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 Warpstone Glow on the colour wheel See Army Green on the colour wheel
All matches: Warpstone Glow equivalents · Army Green equivalents