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Side by side

Bumble and bumble Curl Defining Hair Mousse vs Bumble and bumble Thickening Blow-Dry Prep Spray - 8.5 oz

30% function match · 1 of the 13 functions we compared match Formula overlap 31%. Bumble and bumble Curl Defining Hair Mousse and Bumble and bumble Thickening Blow-Dry Prep Spray - 8.5 oz share 2 ingredients among each other's most prominent.

Based on your consultation

Which of these fits your hair?

We check your pattern, moisture need, scalp, fragrance tolerance, weight sensitivity and more against each formula — and say which one lines up.

Your profile at a glance

  • Your answers appear here
  • Your answers appear here
  • Your answers appear here
  • Your answers appear here

When each one is the right call

What each formula is built for, from its own ingredient list.

  • Curl Defining Hair Mousse — dry, thirsty hair
  • Thickening Blow-Dry Prep Spray - 8.5 oz — protein-hungry hair

Side by side

Every trait, aligned

One row per trait, read from each product’s own ingredient list and record. A dash means we have not researched that field for that product — it is not a “no”.

Trait
Bumble and bumble

Curl Defining Hair Mousse

  • Styler
  • Salon
  • Sulfate-free
  • Moisture-rich
Bumble and bumble Thickening Blow-Dry Prep Spray - 8.5 oz — 8.5 oz container Bumble and bumble

Thickening Blow-Dry Prep Spray - 8.5 oz

  • Styler
  • Salon
  • Sulfate-free
  • Silicone-free
Price, size & price per ounce
$38 5 oz · $7.60/oz
$36 8.5 oz · $4.24/oz
Value / price positioning
Same job for less elsewhere $$$$$ Salon tier · costs more than 94% of the 139 mousses we’ve priced
Priced with its peers $$$$$ Salon tier · costs less than 54% of the 66 volumizers we’ve priced
Best for hair types
Wavy–Coily The brand’s own claims name curly or textured hair. Your hair
Straight–Wavy A light volumising formula — the lift it adds matters most on straighter hair. Your hair
Moisture level Same
Moderate Humectants in the working part of the formula. Your hair
Moderate Humectants in the working part of the formula. Your hair
Hold system Differs
Moderate Gums and synthetic polymers together. Your hair
High Synthetic hold polymers — the firmest of the hold systems. Your hair
Slip / detangling Differs
Moderate Conditioning agents are present, lower in the list. Your hair
High Conditioning agents sit high in the list — this is a detangling formula. Your hair
Weight on hair Differs
Medium Middle of the range — noticeable on fine hair, light on coarse hair. Your hair
Light Water-first and light: unlikely to flatten fine hair. Your hair
Fragrance
Present Fragrance is listed; it sits below the working ingredients. Your hair
Present Fragrance is listed; it sits below the working ingredients. Your hair
Protein Differs
Minor Protein appears, low enough to be a supporting ingredient. Your hair
Prominent Protein high in the list — a strengthening formula, not a moisture one. Your hair
Silicone / wax buildup Differs
High Water-insoluble silicones or waxes: a detergent wash is what removes them. Your hair
None Nothing here needs a detergent wash to remove. Your hair
Clarifying wash needed
Moderate Your hair
Low Your hair
Cast risk Differs
Unlikely Softening ingredients sit alongside the film formers, so a hard shell is unlikely. Your hair
Likely Film formers without much softening them — expect a cast to scrunch out. Your hair
Oil absorption Differs
Some Absorbents appear, low in the list. Your hair
None No absorbent powders or starches. Your hair
Oils and butters Differs
Present, lower down Oils are present, but low enough to be a finishing touch. Your hair
None No oils or butters in the list. Your hair
Fast-drying alcohol Differs
None No fast-drying alcohol in the list. Your hair
High in the list Fast-drying alcohol in the first three ingredients. Your hair
Formula completeness
out of 10
Complete for its job
out of 10
Covers the core
Who should choose this
  • Dry, thirsty hairhumectants and emollients both sit up front
  • Curl definitionfilm formers hold a clump together
  • Very dry hairno fast-drying alcohol in the list
  • Sun and colour fadea UV filter is in the list
  • Protein-hungry hairthat stretches and stays stretched when wet
  • Maximum slipfor hair that tangles the moment it is wet
  • Curly-method routinesno sulfates and no water-insoluble silicones
  • Curl definitionfilm formers hold a clump together
Why you might skip it
  • Scents bother youthis product carries a scent
  • Curly-method routinesthese silicones need a detergent to remove
  • Dry or very humid airwhere heavy humectants work against you
  • Scents bother youthis product carries a scent
  • Protein-sensitive hairthat goes stiff or straw-like on protein
  • Very dry or damaged hairit contains fast-drying alcohol
from the formula stated by the brand reported by reviewers Scale: 1 dot low · 5 dots high, within this product type.
More facts about each one
Type
Styleraerosol
Stylerspray
Where to buy
—
Ulta · Brand website
Free of
  • sulfate-free
  • sulfate-free
  • silicone-free
  • curly-method compatible
Vegan
—
Vegan · label states
Cruelty-free
Cruelty-free · PETA-listed
Cruelty-free · PETA-listed
Scent
Scented, not described
Scented, not described
How often
—
as needed

Facts as we recorded them. A dash means we have not researched that field for that product — it is not a "no".

The bottom line

The bottom line depends on your hair

Which of these two suits you is a question about your hair, not about them. The consultation answers it — and tells you what your routine needs around it.

Take the consultation

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The detail behind the table

Where the readings above come from: the ingredient lists themselves, each brand’s claims checked against them, what owners report, and cost per ounce in context.

Shared and distinct ingredients

Shared and distinct ingredients

Computed from the ingredient lists as printed. "Shared" means both lists carry it; where it sits on each label is stated, because position is what tells you how much.

What both formulas carry

IngredientCurl Defining Hair MousseThickening Blow-Dry Prep Spray - 8.5 oz
Water
Neutral
#1Leading
#1Leading
VP/VA Copolymer
Holds
#2Leading
#4Supporting
Polyquaternium-11
Detangles
#22Secondary
#5Supporting
Fragrance
Fragrance
#31Below the 1% line
#10Below the 1% line
Limonene
Fragrance
#37Below the 1% line
#12Below the 1% line

What only one of them carries

Curl Defining Hair Mousse

Thickening Blow-Dry Prep Spray - 8.5 oz

Full ingredient list — Curl Defining Hair Mousse (41)
Full ingredient list — Thickening Blow-Dry Prep Spray - 8.5 oz (12)

Claims check

What each brand says, against what each formula shows

Claims are quoted from each brand. We only mark one supported, partly supported, or conflicting when that product’s ingredient list actually speaks to it.

VerdictsCurl Defining Hair MousseThickening Blow-Dry Prep Spray - 8.5 oz
Supported
0
3
Partly supported
2
0
Stated by brand
0
0
Potential conflict
0
0

Curl Defining Hair Mousse

  • lightweight hair mousse for curly hair that creates voluminous, bouncy curlsPartly supportedNeutral on lift.
  • deeply moisturizes hair, reduces frizz, and protects against humidity to keep curls lush and liftedPartly supportedNeutral on lift.

Thickening Blow-Dry Prep Spray - 8.5 oz

  • Increases hair thickness and creates a lush, high-volume appearanceSupportedLeaves room for lift.
  • Safe for color-treated, dry, and heat-damaged hairSupportedLess fade per wash.
  • Formulated without parabens, phthalates, mineral oil, and formaldehydeSupportedPreserved without parabens.

What owners say

What people report

Recurring themes our researchers wrote in their own words from sourced reviews. We do not store or scrape star ratings, and we never balance one product’s themes against another’s by inventing them.

Bumble and bumble Thickening Blow-Dry Prep Spray - 8.5 oz draws complaints about weight and volume.

Curl Defining Hair Mousse

Creates bouncy curls with visible volume and lift without weighing hair down, which reviewers found especially beneficial for fine or thin hair textures.

Provides soft-hold curl definition without the crunchiness that many other mousses leave, and reviewers specifically praised the moisturizing feel of the formula.

Application amount matters significantly; using too much product causes the hair to feel crunchy and weighed down instead of soft and bouncy.

Controls frizz effectively while retaining moisture and hydration in curls, making it particularly appealing for managing humidity and environmental challenges.

Thickening Blow-Dry Prep Spray - 8.5 oz

Works best used sparingly and applied before other styling products; gave hair volume and shine

reviewer macabeda (St. Louis), 5-star review

Boosts volume in fine hair and makes styling easier

reviewer Lyn (Oregon), 5-star review

High alcohol content dried out fine, color-treated hair and left an overpowering chemical odor that lingered on clothing

most-helpful negative review, 2-star

Left hair flat and staticky, felt like adding water rather than adding volume

reviewer Diana (Kansas), 1-star review

Adds volume and lift without weighing hair down; a little goes a long way, but the scent is a downside

reviewer Bbradley (Bloomington, IN), 4-star review

Price check

Cost per ounce, in context

Cost per ounce against every product of this type we have priced, each at the size it is most often sold in. Value labels are computed from that percentile and from how many products that do the same job cost less; they are comparisons, not judgements about a brand.

$4.24/oz vs $7.60/oz — Bumble and bumble Curl Defining Hair Mousse costs about 1.8× more per ounce than Bumble and bumble Thickening Blow-Dry Prep Spray - 8.5 oz.

Curl Defining Hair Mousse

Against 139 mousses with a computable unit price.

Thickening Blow-Dry Prep Spray - 8.5 oz

Against 66 volumizers with a computable unit price.

Value readCurl Defining Hair MousseThickening Blow-Dry Prep Spray - 8.5 oz
Label
Same job for less elsewhereYou are paying above the range for a formula close to several lower-priced options.
Priced with its peersSits in the middle of the range for volumizers per ounce.

Computed from cost per ounce against every product of this type we have priced, and from how many products that do the same job cost less. It is a comparison, not a judgement about the brand.

Compare with something else

Close formulas to each of these, as their own comparison pages.

Curl Defining Hair Mousse vs Brews Molding PasteRedken · 85% function matchThickening Blow-Dry Prep Spray - 8.5 oz vs Style-Setting Volumizing PrimerVirtue · 91% function matchCurl Defining Hair Mousse vs Re-Works Styling CreamPaul Mitchell · 85% function matchThickening Blow-Dry Prep Spray - 8.5 oz vs Curl Enhancing Hair StylerWondercurl · 89% function matchCurl Defining Hair Mousse vs Straight Blow Dry Heat Protective Styling CreamBumble and bumble · 85% function matchThickening Blow-Dry Prep Spray - 8.5 oz vs Get Set Hair Jelly GelWondercurl · 89% function matchCurl Defining Hair Mousse vs Curl Defining Creme 5Kenra Professional · 83% function matchThickening Blow-Dry Prep Spray - 8.5 oz vs Almond & Avocado Anti-Frizz Curl Defining GelDesign Essentials · 89% function match

Curl Defining Hair Mousse · Thickening Blow-Dry Prep Spray - 8.5 oz · All mousses in the library

How this page was made

  • This page is assembled from the same researched records the individual product pages render: identity, each ingredient list as printed, each brand's own claims, dated price observations, and review themes written in our researchers' own words. Nothing on it is written per comparison.
  • We do not rank these against each other. Which of them suits you depends on your hair, and that is what the consultation works out.
  • The formula similarity percentage is a stored, precomputed number: position-weighted overlap of the two ingredient lists blended with agreement on the attributes we derive. It measures how alike two formulas are, not how well either works.
  • The value band is a fixed label over two stored numbers: this product’s cost per ounce as a percentile of every product of this type we have priced, each at the size it is most often sold in, and how many products we score as doing the same job cost at least a quarter less per ounce.
  • The "Is this right for you?" panel reads only your own consultation answers, and it applies exactly the filters our recommendation engine applies. It is computed when you load the page and is never stored on it.
  • 3 sources were consulted across the products on this page.
  • Ingredient order tells you relative amount only above roughly 1%. Prices are observations on the dates shown and change without notice. We do not sell these products and take no placement fees.
  • This is cosmetic information, not medical advice, and nothing here diagnoses or treats a health condition.

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