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