Comparing the two fragrances…

Black Phoenix Alchemy Lab

Rag & Bone
Shadow
Amber
Only in Shadow
Only in Amber
Shared character
Both Shadow and Amber feature notes of amber, rum, and agarwood, and share woody, amber, rum, and warm spicy accords.
How they differ
Shadow includes powdery, animalic, fresh spicy, and oud accords. Amber contains bergamot, vanilla, saffron, tobacco leaf, plum, oud, tobacco, cognac, and liquidambar, resulting in floral, ambery, fruity, tobacco, sweet, and vanilla accords.
Who each suits
Shadow suits those who prefer animalic, powdery, and fresh spicy profiles. Amber suits those who prefer sweet, fruity, floral, and tobacco-oriented profiles.