Comparing the two fragrances…

Amouage

Memo Paris
Silver Man
Marfa Oud
Shared character
Both Silver Man and Marfa Oud belong to the woody fragrance family and share a composition featuring orange blossom, ylang-ylang, heliotrope, sandalwood, musk, mandarin, and incense/olibanum. They both exhibit citrus, woody, powdery, and white floral accords.
How they differ
Silver Man features unique notes of jasmine, rose, bergamot, vetiver, amber, orchid, patchouli, plum, frankincense, and mandarin orange, resulting in floral, ambery, fruity, sweet, and musky accords. Marfa Oud contains unique notes of tuberose, cedarwood, vanilla, neroli, oud/agarwood, citruses, cedar, white musk, ebony, and agave, which produce green, oud, tuberose, and vanilla accords.
Who each suits
Silver Man suits those who prefer floral, ambery, fruity, sweet, and musky profiles. Marfa Oud suits those who prefer green, oud, tuberose, and vanilla profiles.