ΔE 17.5, loose: different enough that you should pick on purpose. Splinter Green is a little darker, much more muted than Vivid Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 17). Splinter Green is a little darker, much more muted than Vivid Green.
The same difference applies the other way round: Vivid Green is a little lighter, much more saturated.
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 Vivid Green on the colour wheel See Splinter Green on the colour wheel
All matches: Vivid Green equivalents · Splinter Green equivalents