ΔE 30.8, loose: different enough that you should pick on purpose. Army Green is noticeably darker, much more muted, cooler than Dorn Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Army Green is noticeably darker, much more muted, cooler than Dorn Yellow.
The same difference applies the other way round: Dorn Yellow is noticeably lighter, much more saturated, 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 Dorn Yellow on the colour wheel See Army Green on the colour wheel
All matches: Dorn Yellow equivalents · Army Green equivalents