No, the problem is that Corona (but also other renderers, like MentalRay, or Maxwell,etc..) use different 'translucency' compared to Vray2Sided. Vray2sided map is BW because it only takes intensity from it, but the color is still derived from diffuse of material.
In Corona, the translucency map drives both the intensity (through average luminosity) but also color. So vegetation will always use colored map in translucency but I write that in the above post.