Comparing the two fragrances…

Régalien

Zara
Hammam
Regal White
Only in Hammam
Shared character
Both Hammam and Regal White belong to the woody, aquatic, fresh, synthetic, and aromatic fragrance families.
How they differ
Hammam features notes of bergamot, orange blossom, cedarwood, geranium, lavender, ozonic notes, lemon grass, haitian vetiver, eucalyptus, turkish soap, air accord, and soap, with accords of floral, citrus, camphor, fresh spicy, herbal, and ozonic. In contrast, Regal White contains notes of vetiver, fig, ambroxan, coconut water, and chestnut, characterized by green, fruity, sweet, earthy, amber, musky, and nutty accords.
Who each suits
Hammam suits those who prefer soapy, herbal, and camphoraceous profiles with citrus and floral elements. Regal White suits those who prefer sweet, fruity, and nutty profiles with earthy and musky undertones.
More Hammam comparisons
Only in Regal White