YSL Black Opium vs Good Girl: Which Dupe Should You Buy? (UK)

Two scents dominate any conversation about bold evening perfume for women: YSL Black Opium and Carolina Herrera Good Girl. Both are dark, sweet and unmistakably made for the after-dark hours — but they are not the same, and the version you should buy depends entirely on the mood you are after. This is a UK head-to-head of our two inspired-by interpretations, covering how each one smells, when to wear it, how long it lasts, and which is the smarter pick for you.

For honesty: both of the scents below are our own inspired-by interpretations at eau de parfum strength, made in the UK. They are not the original perfumes and we are not affiliated with either house — we build our blends around scent profiles that are already public knowledge. They are similar interpretations, not identical copies, from £4.95 for a sample.

In the black corner: inspired by YSL Black Opium

The Black Opium profile is a dark, sweet gourmand built around black coffee and vanilla. The coffee gives it an addictive, slightly bitter edge that stops the vanilla turning too sweet, while white flowers and a touch of pink pepper add lift and a little sparkle up top. The overall effect is warm, glossy and nocturnal — think candlelit bar rather than sunny brunch.

Our No. 248, inspired by Black Opium, keeps that coffee-and-vanilla core front and centre, with the floral lift softening the edges. On skin it is smooth, sweet and grown-up. Longevity is strong — those heavy gourmand bases anchor it for hours — with moderate-to-strong sillage that leaves a cosy trail without overwhelming a room.

Wear it when: date nights, parties, dinners and cold-weather evenings. It is the more overtly sexy, low-lit of the two — sweet, warm and a little bit dangerous.

In the other corner: inspired by Good Girl

Good Girl is bolder and more floral. The profile opens with almond and coffee, moves through a big, creamy tuberose heart, and settles into a base of tonka and cocoa. That tuberose is the difference-maker: where Black Opium is coffee-led and smooth, Good Girl is a statement floral-gourmand with more drama and more projection. It is confident, polished and impossible to ignore.

Our No. 135, inspired by Good Girl, holds that almond-tuberose-cocoa signature with real presence. Longevity is strong and the trail is noticeable — this is a scent designed to be sensed across a room. It reads as glamorous and bold rather than cosy.

Wear it when: celebrations, nights out, events and any occasion where you want to make an entrance. It is the more floral, more theatrical choice.

Black Opium vs Good Girl: the key differences

• Sweetness style: Black Opium is coffee-and-vanilla sweet — smooth and gourmand. Good Girl is almond-cocoa sweet wrapped around a big tuberose — floral-gourmand.
• Personality: Black Opium is intimate and nocturnal; Good Girl is bold and attention-commanding.
• Sillage: both project well, but Good Girl's tuberose tends to announce itself more assertively, while Black Opium keeps a slightly closer, cosier trail.
• Longevity: both are strong all-evening performers thanks to their rich gourmand bases — neither will let you down over a long night.
• Season: both shine in autumn and winter; Black Opium is the easier one to also wear on a cooler daytime, Good Girl leans firmly evening.

Which dupe should you buy?

Choose the Black Opium interpretation (No. 248) if you want a warm, sweet, coffee-vanilla gourmand that feels intimate and sensual — the scent you reach for on a date or a quiet, glamorous evening. It is the more versatile of the two and the easier first purchase if you are new to dark gourmands.

Choose the Good Girl interpretation (No. 135) if you want boldness and drama — a floral-gourmand that projects confidence and turns heads at a party or celebration. It is the statement pick.

Still torn? You do not have to choose blind. Both come as 5ml samples from £4.95, so the honest answer is to try them side by side on your own skin and let your nose decide — and with our Buy 3 Get 3 Free offer, sampling both plus a third costs very little. For fuller write-ups, see our guides to the best perfumes for women in the UK and the best women's perfume dupes UK.

Price and the honest small print

The designer originals of both scents typically retail from around £90 to £120 for a full bottle. Our inspired interpretations are £26.95 for 100ml or £4.95 for a 5ml sample, vegan, cruelty-free and made in the UK. They are similar interpretations of well-known scent profiles, not identical reproductions, and small differences in the opening and dry-down are normal. What you get is the same overall mood — and the freedom to own both for less than the price of one designer bottle.