ΔE 23.4, loose: different enough that you should pick on purpose. Russ. AF Light Blue is noticeably lighter, cooler than Viridian Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 23). Russ. AF Light Blue is noticeably lighter, cooler than Viridian Green.
The same difference applies the other way round: Viridian Green is noticeably darker, 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 Viridian Green on the colour wheel See Russ. AF Light Blue on the colour wheel
All matches: Viridian Green equivalents · Russ. AF Light Blue equivalents