Greenskin Punch vs Warpstone Glow

How close are they?

ΔE 18.1, loose: different enough that you should pick on purpose. Warpstone Glow is more saturated, warmer than Greenskin Punch.

Can I use Warpstone Glow instead of Greenskin Punch?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 18). Warpstone Glow is more saturated, warmer than Greenskin Punch.

Can I use Greenskin Punch instead of Warpstone Glow?

The same difference applies the other way round: Greenskin Punch is 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.