ΔE 8.3, close: similar, with a visible difference side by side. Light Bismuth Yellow is a little lighter, cooler than Ice Yellow.
Usually, if you are not matching paint already on the model. Close match (ΔE 8). Light Bismuth Yellow is a little lighter, cooler than Ice Yellow.
The same difference applies the other way round: Ice Yellow is a little 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 Ice Yellow on the colour wheel See Light Bismuth Yellow on the colour wheel
All matches: Ice Yellow equivalents · Light Bismuth Yellow equivalents