ΔE 29.0, loose: different enough that you should pick on purpose. Yellow Green is more saturated, cooler than Phalanx Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 29). Yellow Green is more saturated, cooler than Phalanx Yellow.
The same difference applies the other way round: Phalanx Yellow is more muted, 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 Phalanx Yellow on the colour wheel See Yellow Green on the colour wheel
All matches: Phalanx Yellow equivalents · Yellow Green equivalents