The Trained Nose

Rouge Bonheur 2025 Millésime against Aqua Allegoria Rosa Rossa (A Chinese New Year Limited Edition)

One number per era rather than one number overall — two fragrances can be near-identical at the opening and different things by the evening, and an average hides exactly that.

How close, and when

Across a whole wearing, Guerlain Rouge Bonheur 2025 Millésime and Guerlain Aqua Allegoria Rosa Rossa (A Chinese New Year Limited Edition) are related, not interchangeable. They are nearest during the drydown and furthest apart in the opening, which is the part a single figure would average away.

12% opening · 0–1 h
47% heart · 1–3 h
82% drydown · 3–8 h
Measured across all twenty-four facets, from the notes below — not from the families on the boxes. They share 3 of 12 materials, which is worth holding beside the figures: a pair can share almost nothing and still converge, because different materials can smell of the same things.

What AKIN predicts

AKIN predicts these two are alike, and the evidence behind that is substantial.

Two signals sit on this page and are never averaged: what the note pyramids measure these two to share, and what AKIN’s resemblance graph predicts. Where they part, that is the finding rather than a fault.

The pyramids, side by side

Compared by material rather than by spelling, so a note recorded two ways is not counted as a difference.
top
Rouge Bonheur 2025 Millésime only — Ginger, Pepper
Aqua Allegoria Rosa Rossa (A Chinese New Year Limited Edition) only — Bergamot, Blackcurrant, Lemon, Litchi
heart
both — Rose
Rouge Bonheur 2025 Millésime only — Magnolia
Aqua Allegoria Rosa Rossa (A Chinese New Year Limited Edition) only — Peony
base
both — Cedar, White Musk
Aqua Allegoria Rosa Rossa (A Chinese New Year Limited Edition) only — Iso E Super

Other comparisons worth reading

Pairs involving one of these two where the notes are fully recorded on both sides and AKIN has enough evidence for the pair to be worth reading.