ΔE 41.2, loose: different enough that you should pick on purpose. Green Rust is noticeably lighter, much more muted, cooler than Techno Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 41). Green Rust is noticeably lighter, much more muted, cooler than Techno Green.
The same difference applies the other way round: Techno Green is noticeably darker, 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 Techno Green on the colour wheel See Green Rust on the colour wheel
All matches: Techno Green equivalents · Green Rust equivalents