Comparing the two fragrances…

Façonnable

Michalsky
Riviera
Iii For Men
Only in Riviera
Shared character
Both Riviera and Iii For Men share a woody character and feature a common olfactory profile of bergamot, cedarwood, grapefruit, leather, mandarin, incense/olibanum, nutmeg, patchouli, and tonka bean.
How they differ
Riviera incorporates unique notes of oakmoss, amber, guaiac wood, red apple, white amber, frankincense, eucalyptus, and Italian mandarin orange, resulting in citrus, fruity, smoky, balsamic, fresh spicy, and warm spicy accords. In contrast, Iii For Men features ciste labdanum, vanilla, vetiver, pink pepper, and black pepper, which contribute to ambery (oriental) accords.
Who each suits
Riviera may suit those who prefer a combination of fruity, smoky, and fresh spicy elements. Iii For Men may suit those who prefer ambery (oriental) profiles.
Only in Iii For Men