ΔE 17.9, loose: different enough that you should pick on purpose. Naples Yellow Hue is noticeably darker, more saturated, warmer than Ice Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Naples Yellow Hue is noticeably darker, more saturated, warmer than Ice Yellow.
The same difference applies the other way round: Ice Yellow is noticeably lighter, 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 Ice Yellow on the colour wheel See Naples Yellow Hue on the colour wheel
All matches: Ice Yellow equivalents · Naples Yellow Hue equivalents