ΔE 29.6, loose: different enough that you should pick on purpose. Honey Moon Yellow is a little darker, much more saturated than Imp Yellow.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 30). Honey Moon Yellow is a little darker, much more saturated than Imp Yellow.
The same difference applies the other way round: Imp Yellow is a little lighter, much more muted.
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 Imp Yellow on the colour wheel See Honey Moon Yellow on the colour wheel
All matches: Imp Yellow equivalents · Honey Moon Yellow equivalents