ΔE 18.8, loose: different enough that you should pick on purpose. Clear Yellow is a little lighter, more saturated, cooler than Maize Yellow. They are different kinds of paint: Army Painter Maize Yellow is a one-coat contrast-style paint and Reaper Clear Yellow is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Clear Yellow is a little lighter, more saturated, cooler than Maize Yellow. They are different kinds of paint.
The same difference applies the other way round: Maize Yellow is a little darker, 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 Maize Yellow on the colour wheel See Clear Yellow on the colour wheel
All matches: Maize Yellow equivalents · Clear Yellow equivalents