ΔE 5.4, very close: most people won’t see a difference side by side. Orange is a little darker than Molten Lava. They are different kinds of paint: Army Painter Molten Lava is an opaque base/layer paint and Green Stuff World Orange is an ink, glaze or transparent 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). Orange is a little darker than Molten Lava. They are different kinds of paint.
The same difference applies the other way round: Molten Lava is a little lighter.
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 Molten Lava on the colour wheel See Orange on the colour wheel
All matches: Molten Lava equivalents · Orange equivalents