ΔE 5.4, very close: most people won’t see a difference side by side. Ancient Honey is a little darker, more saturated than Lemon Yellow. They are different kinds of paint: AMMO by Mig Lemon Yellow is an opaque base/layer paint and Army Painter Ancient Honey is a one-coat contrast-style paint, so they won’t behave the same on the model even where the colour is close.
Yes, for most jobs. Very close match (ΔE 5). Ancient Honey is a little darker, more saturated than Lemon Yellow. They are different kinds of paint.
The same difference applies the other way round: Lemon Yellow is a little lighter, 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 Lemon Yellow on the colour wheel See Ancient Honey on the colour wheel
All matches: Lemon Yellow equivalents · Ancient Honey equivalents