Koa
The closest matches to Koa in the Osmagora library are Police Legend for Woman (Police) · Spirit of Sensual Desire (Spirit) · Look (Agatha Ruiz De La Prada), ranked by how much of its note profile they share. See them side by side →
Inspired-by houses (1)
These houses market their scents as versions of other fragrances. Listed apart, so the matches above stay scents in the same spirit.
What smells like Koa?
These fragrances genuinely share the character of Koa by Jealous, a amber/oriental scent, ranked by how much of its note profile they have in common. Not cheaper copies; scents in the same spirit.
Osmagora compares the full note profile of Koa, its top, heart and base notes, against every fragrance in the library, and ranks them by how much they genuinely share. The figure shown is that note overlap, kept deliberately conservative. These are scents in the same spirit, not cheaper copies or marketing lookalikes. Where nothing clears our bar, we say so plainly rather than dress a weak match as a strong one.