Comparing the two fragrances…

Amouage

Ferrari
Opus IV
Oud Essence
Only in Opus IV
Shared character
Both Opus IV and Oud Essence belong to the woody and ambery (oriental) fragrance families. They share a common olfactory profile consisting of rose, ciste labdanum, elemi, incense (olibanum), animalic notes, and cumin.
How they differ
Opus IV features a wider array of notes including lemon, grapefruit, musk, mandarin, cardamom, coriander, violet leaves, and red berries. In contrast, Oud Essence is characterized by notes of leather, saffron, and oud (agarwood).
Who each suits
Opus IV may suit those who prefer a profile containing citrus, spice, and berry elements alongside the shared base. Oud Essence may suit those seeking a composition centered on leather, saffron, and oud.
Only in Oud Essence