ΔE 7.1, close: similar, with a visible difference side by side. Viridian Green Hue is more muted, warmer than Majestic Fortress. They are different kinds of paint: Army Painter Majestic Fortress is an opaque base/layer paint and Golden Viridian Green Hue is an ink, glaze or transparent paint, so they won’t behave the same on the model even where the colour is close.
Usually, if you are not matching paint already on the model. Close match (ΔE 7). Viridian Green Hue is more muted, warmer than Majestic Fortress. They are different kinds of paint.
The same difference applies the other way round: Majestic Fortress is more saturated, 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.
See Majestic Fortress on the colour wheel See Viridian Green Hue on the colour wheel
All matches: Majestic Fortress equivalents · Viridian Green Hue equivalents