Hmmmmm......Contrasting, basically the long stems and very dark green of the java moss as compared with the shorter stems and lighter greens of the Kyoto can make a stronger impact on the overall look of your Vivarium.
You would only need one packet of the Kyoto moss spores.
So if you wanted to grow your moss in the fline cracks/lines on your budha head - just place a small amount of substrate (coco husk etc...) into the cracks/lines and the a small amount of spore - they will grow very nicely