ΔE 31.3, loose: different enough that you should pick on purpose. Martian Green is noticeably lighter, much more saturated, cooler than Warplock Bronze.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 31). Martian Green is noticeably lighter, much more saturated, cooler than Warplock Bronze.
The same difference applies the other way round: Warplock Bronze is noticeably darker, much 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 Warplock Bronze on the colour wheel See Martian Green on the colour wheel
All matches: Warplock Bronze equivalents · Martian Green equivalents