Different colour of C. sp. 'Lingga Island' flowers

I was fortunate to be able to go for a long field trip to Lingga Island of Riau Islands with my explorer friend recently. And guess what did we found, 2 different coloured spathe C. sp. 'Lingga Island'specimens in 2 different locations! It is not a freak occurrence, we found a few spathes at each of the locations and the spathes at the same location have similar colour. Is this local variation within the same species? Anyway, they are fabulously beautiful!