ΔE 19.1, loose: different enough that you should pick on purpose. Natural Flesh is a little darker, much more saturated, warmer than Sun Ray.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Natural Flesh is a little darker, much more saturated, warmer than Sun Ray.
The same difference applies the other way round: Sun Ray is a little lighter, much more muted, cooler.
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 Sun Ray on the colour wheel See Natural Flesh on the colour wheel
All matches: Sun Ray equivalents · Natural Flesh equivalents