Comparing the two fragrances…

Penhaligon'S

Trussardi
Alizarin
Amber Oud
Shared character
Both Alizarin and Amber Oud belong to the woody and ambery (oriental) fragrance families. They share a core composition of vetiver, amber, leather, patchouli, frankincense, and oud / agarwood, resulting in spicy and woody accords.
How they differ
Alizarin features a complex profile including citrus, green, floral, smoky, and animalic accords, with notes of jasmine, rose, tuberose, narcissus, mimosa, iris, bergamot, mandarin orange, cardamom, cinnamon, ginger, bay, and papyrus. Amber Oud is characterized by sweet and resinous accords, utilizing notes of lemon, geranium, elemi, benzoin, incense / olibanum, and pink pepper.
Who each suits
Alizarin suits those who prefer a multifaceted blend of floral, citrus, and smoky elements. Amber Oud suits those who prefer a profile focused on sweet, resinous, and peppery notes.
Only in Amber Oud