With the introduction of purple glow skins from the DLC some weapons now have 3 different glow skins. There is no way to tell what colour the skin is until you apply it in the crafting menu. My suggestion would be to add a little icon like a coloured dot for those illusions with a glow effect to mark the colour. It’s not a huge deal but this problem will eventually get worse as they add more illusions and colours.
The icon could be placed both on the inventory tile for both weapons in inventory and illusions on the crafting screen.