Beautifully put Bay Oud! Shamama from what I've gathered from YouTube videos uses several more spices and herbs in addition to clove, cardamom, and cinnamon, such as mace, nutmeg, saffron, jatamansi, Himalayan Cedar (A true cedar), and even oak moss, to name a few, probably patchouli as well! All of which contribute to the earthy aroma, and a much greater complexity, but I can see Samadhi working well, as a brighter alternative to Shamama.
One thing I love about these compositions is their ability to transport me instantly to Autumn, whatever time of the year it might be.