Fragrance comparison

Theorem vs Irth

Notes, accords, longevity, sillage, seasons and community ratings, side by side.

Updated 15 Nov 2026 151 ratings analysed

Theorem

Soma Parfums

4.0012 votes

Rank #45,070 Warm SpicyIris

Full profile Similar & dupes

12%scent match

Clearly different

3 wins

Irth

Nabeel

4.32139 votes

Rank #7,300 WoodyFruity

Full profile Similar & dupes

Quick verdict

Which one should you pick?

Irth takes 3 of 5 categories.

Theorem
Choose it for a warm spicy and iris character. Wins on longevity and sillage & projection. Best in fall, evening wear.
Irth
Choose it for a woody and fruity character. Wins on ratings & consensus, value for money and fragranxe ranking. Best in winter.

Theorem2/5

Irth3/5

Ratings & consensus: Irth
Community sentiment: Not scored
Longevity: Theorem
Sillage & projection: Theorem
Value for money: Irth
Versatility: Not scored
Note pyramid (duration): Not scored
Fragranxe ranking: Irth

Head-to-head breakdown

Every category side by side, with the winner called out.

Fragrance

TheoremSoma Parfums

IrthNabeel

Winner

Ratings & consensus

Average rating and ownership split

4.00/ 5 · 12 votes

Have 20%Had 3%Want 77%

4.32/ 5 · 139 votes

Have 42%Had 7%Want 52%

Category winnerIrthRating weighted by vote count

Community sentiment

How voters split from love to hate

50%Love

25%Like

8%Ok

8%Dislike

8%Hate

12 votes · too few to score

52%Love

35%Like

8%Ok

5%Dislike

1%Hate

139 votes

Category winnerNot enough dataMost positive mix (25+ votes)

Longevity & sillage

0–100 community performance scores

⏱ Longevity76

〰 Sillage65

♥ Love / hate75

⏱ Longevity72

〰 Sillage64

♥ Love / hate83

Category winners

LongevityTheorem

SillageTheorem

Value for money

How fairly priced voters find it

¤ Price value55

¤ Price value74

Category winnerIrthBest value score

Main accords

Strength of each scent family · outlined = shared by both

warm spicy100%

iris92%

rose84%

cacao77%

patchouli69%

earthy61%

woody100%

fruity92%

powdery84%

sweet77%

musky69%

rose61%

Scent match12%Clearly different · both rose

Note pyramid (duration)

Top, heart and base, with how long each lasts when known · gold = shared

Top

CardamomCinnamon

Heart

IrisRose

Base

PatchouliCacaoAmberMyrrh

Top

Damask RoseSpicesDried FruitsStrawberryPeachCandied FruitsPineappleCoconut

Heart

RoseOudCypriol Oil or NagarmothaAmyrisCedarwoodLily of the ValleyVioletIris

Base

White MuskVanillaLeatherAmberAmbergrisCivetGuaiac WoodSandalwood

InformationalShared notesIris, Rose and Amber. Note durations are not published for these fragrances, so this is not scored.

Seasons & time of day

Relative to each fragrance's best season

Spring50

Summer0

Fall100

Winter100

Day67

Night100

Spring76

Summer0

Fall0

Winter100

Day–

Night–

Category winnerNot enough dataMost year-round

Who wears it

Gender appeal votes

Men17

Unisex50

Women33

Men36

Unisex54

Women10

InformationalProfile onlyAudience is not scored

Ranking & credits

Fragranxe overall rank, nose and launch

Overall rank#45,070

PerfumerNot listed

Launched—

Reviews1

Overall rank#7,300

PerfumerNot listed

Launched—

Reviews9

Category winnerIrthHigher overall rank

In a nutshell

Description & review snapshot

Theorem by Soma Parfums opens with a sharp burst of cardamom and cinnamon before yielding to soft iris and rose. Dustings of dark cacao and rich patchouli ground the heart, while golden amber and myrrh form a warm, resinous dry-down. It suits cool autumn evenings and formal winter gatherings when you want a quiet, coz…

Reviews →

Nabeel Irth arrives as a dense, sweet-spicy scent that commands attention. Released in 2023, it merges a heavy dose of dried fruits, strawberry, and cinnamon with a dark base of leather, amber, and incense. It fits best in freezing winter weather, wrapping the wearer in a thick, warm shield of exotic spices and woods.

Reviews →

InformationalRead bothTaste is personal

How we score: ratings blend public fragrance ratings with Fragranxe member votes; longevity, sillage, value and sentiment are community vote scores, and season bars are relative to each fragrance's strongest season. Categories with too little data are shown but not scored. The scent match weighs accord overlap (60%) and shared notes (40%). More in the FAQ.

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Common questions

Straight answers from the data above.

Which is better, Theorem or Irth?

Irth takes 3 of 5 categories. Theorem is rated 4.00/5 from 12 votes; Irth is rated 4.32/5 from 139 votes. Choose Theorem for a warm spicy and iris character. Wins on longevity and sillage & projection. Best in fall, evening wear. Choose Irth for a woody and fruity character. Wins on ratings & consensus, value for money and fragranxe ranking. Best in winter.

Which lasts longer, Theorem or Irth?

Theorem lasts longest (Theorem 76/100, Irth 72/100), based on community performance votes.

Which projects more, Theorem or Irth?

Projection is very close: Theorem 65/100, Irth 64/100 for sillage.

Do Theorem and Irth smell similar?

Clearly different: a 12% scent match on Fragranxe. Both share rose accords. Common notes include Iris, Rose and Amber.

Is Theorem or Irth better for summer or winter?

Theorem suits evening wear. Based on community season votes.

What are the notes in Theorem and Irth?

Theorem has top notes of Cardamom and Cinnamon, heart notes of Iris and Rose, a base of Patchouli, Cacao, Amber and Myrrh. Irth has top notes of Damask Rose, Spices, Dried Fruits and Strawberry, heart notes of Rose, Oud, Cypriol Oil or Nagarmotha and Amyris, a base of White Musk, Vanilla, Leather and Amber.