ΔE 24.4, loose: different enough that you should pick on purpose. Russ. AF Light Blue is noticeably darker, cooler than Tooth and Nails.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 24). Russ. AF Light Blue is noticeably darker, cooler than Tooth and Nails.
The same difference applies the other way round: Tooth and Nails is noticeably lighter, 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 Tooth and Nails on the colour wheel See Russ. AF Light Blue on the colour wheel
All matches: Tooth and Nails equivalents · Russ. AF Light Blue equivalents