Anima i think is intentional, considering both instances of it describe a vital life force. The Maw being related to the Sha is more shaky i think, considering the Sha is supposed to be representations of withered trees, and ash and the like. Not to mention the Sha had different colors, not just gray, the strongest two being red and blue instead.
I honestly think it is just a coincidence, as both are supposed to show something being completely dead, as opposed to mostly dead.