ΔE 24.6, loose: different enough that you should pick on purpose. Naples Yellow Hue is a little lighter, much more saturated, cooler than Eldar Flesh.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 25). Naples Yellow Hue is a little lighter, much more saturated, cooler than Eldar Flesh.
The same difference applies the other way round: Eldar Flesh is a little 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 Eldar Flesh on the colour wheel See Naples Yellow Hue on the colour wheel
All matches: Eldar Flesh equivalents · Naples Yellow Hue equivalents