The Trained Nose

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CK One against CK One Essence

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.
Calvin Klein

CK One

· lasts about 6.9 h
Read the entry Centre the map here
Calvin Klein

CK One Essence

· lasts about 5.2 h
Read the entry Centre the map here

How close, and when

Across a whole wearing, Calvin Klein CK One and Calvin Klein CK One Essence are related, not interchangeable. They are nearest during the opening and furthest apart in the heart, which is the part a single figure would average away.

58% opening · 0–1 h
41% heart · 1–3 h
52% drydown · 3–8 h
Measured across all twenty-four facets, from the notes below — not from the families on the boxes. They share 2 of 28 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
both — Bergamot
CK One only — Cardamom, Lemon, Mandarin Orange, Papaya, Pineapple
CK One Essence only — Black Pepper, Blood Orange, White Tea
heart
CK One only — Freesia, Jasmine, Lily of the Valley, Nutmeg, Orris Root, Rose, Violet
CK One Essence only — Geranium, Green Tea, Mint
base
both — Musk
CK One only — Amber, Cedar, Green Tea, Oakmoss, Sandalwood
CK One Essence only — Australian Sandalwood, Incense, Moss

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.