Comparing the two fragrances…

MOH

Yves Saint Laurent
Tobac
Opium
Only in Tobac
Shared character
Both Tobac and Opium share a woody character and feature a combination of bergamot, cedarwood, sandalwood, vanilla, musk, cinnamon, clove, carnation, and frankincense.
How they differ
Tobac is characterized by tobacco, clary sage, black pepper, amyris, cashmeran, and champaca, resulting in sweet, powdery, balsamic, musky, and warm spicy accords. Opium features a wide array of floral, resinous, and oriental accords, including jasmine, rose, ylang-ylang, lily of the valley, peach, plum, and various citrus fruits like lemon, mandarin, and tangerine. It also contains notes of patchouli, benzoin, amber, myrrh, opoponax, castoreum, orris root, and tolu balm.
Who each suits
Tobac suits those who prefer tobacco, balsamic, and powdery profiles. Opium suits those who prefer heavy floral, spicy, and resinous oriental profiles.