Multi-Stylers & Dupes
Shark FlexStyle vs SpeedStyle Pro: Do You Need the Styler?
One of these is a hair dryer. The other is a hair dryer that bends in the middle. Shark publishes enough to tell you whether the bend is worth it.
Updated October 2026 · Sawyer V.
If you only dry, buy the SpeedStyle Pro. It publishes 1,750 W against the FlexStyle’s 1,600 W, six named attachments against a configurable set, and costs less. Buy the FlexStyle only if you genuinely want auto-wrap curls, because that is the single thing the SpeedStyle cannot do. Both are 1.5–1.65 lb, both 120 V only, both two-year warranty, and neither publishes a heat or speed count.

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Side by side, published only
Shark FlexStyle (HD400SN) vs Shark SpeedStyle Pro (HD731), as published
| Row | FlexStyle | SpeedStyle Pro |
|---|---|---|
| Wattage | 1,600 W (peak) | 1,750 W (peak) |
| Heat settings | Not published | Not published |
| Speed settings | Not published | Not published |
| Weight | 1.5 lb | 1.65 lb |
| Cord length | 8 ft | 96.1 in (8.0 ft) |
| Attachments | Configurable — auto-wrap curlers, oval brush, paddle brush, concentrator, diffuser | Turbo concentrator, QuickSmooth brush, DefrizzFast diffuser, wide-tooth comb, touch-up brush, FrizzFighter finishing tool |
| Styling surface | Coanda airflow barrels; no clamped heat plate | High-velocity airflow; no heated styling surface |
| Curls hair | Yes — auto-wrap barrels | No |
| Dual voltage | No — 120 V | No — 120 V |
| Warranty | 2-year limited | 2-year limited |
Quoted from SharkNinja's own product pages.
Six of the ten rows are effectively a tie, and the four that are not point in opposite directions. That is unusual and it is what makes this a real decision rather than a ranking.
What the FlexStyle actually adds
The FlexStyle’s whole proposition is in its hinge: the body folds so the same motor serves as a dryer in one position and an air styler in the other. With the auto-wrap barrels on, fast curved airflow pulls a section around the barrel and dries it into shape — the same Coanda principle the Dyson Airwrap uses, and the reason there is no hot plate pressed against the fiber.
That is genuinely one capability the SpeedStyle Pro does not have. The SpeedStyle is a dryer with a lot of attachments; none of them wraps hair for you. If the reason you are shopping is that you want curls without a barrel contact tool, the FlexStyle is the answer in this pair and the SpeedStyle is not a substitute at any price.
It is worth being precise about what the Coanda mechanism needs, though, because it is the most common disappointment with this class of tool: it works on damp hair, not dry. You are drying the hair into a shape, which means starting most of the way wet. A rotating barrel or a curling iron curls dry hair; this does not. Air styler vs curling iron has the mechanism in full, and the automatic curlers compares the two mechanisms directly.
150 watts, the wrong way round
The SpeedStyle Pro publishes 1,750 W and the FlexStyle 1,600 W. The more expensive, more capable tool is the lower-powered one.
That is not a fault, it is a design consequence. The FlexStyle has to push air through narrow curling barrels at a controlled velocity, and more raw power is not what that needs. The SpeedStyle only has to move air fast through a wide body, so Shark gave it more. The practical upshot is that on thick or long hair, the cheaper tool dries faster — which is the opposite of what the price order suggests.
Set against the category, 1,750 W is the highest published figure of any premium dryer on this site and 1,600 W is exactly what Dyson publishes for the Supersonic. Neither figure tells you much about result quality — what wattage actually tells you explains why the premium tools publish the lowest numbers — but within one brand and one airflow design, the comparison is fair, and it goes to the SpeedStyle.
On running cost the gap is trivial. At 65 hours a year and the U.S. average residential rate of 18.34 cents per kilowatt-hour, 1,750 W costs about $20.86 a year and 1,600 W about $19.07 — under two dollars between them. Running costs has the formula. Do not let it decide anything.
The attachment lists, which are the real difference
This is where the two tools diverge most and where Shark’s publishing habits differ oddly between them.
For the SpeedStyle Pro, Shark names six attachments outright: a turbo concentrator, a QuickSmooth brush, a DefrizzFast diffuser, a wide-tooth comb, a touch-up brush and a FrizzFighter finishing tool. That is the longest named attachment list of any tool in this registry, and two of those — the wide-tooth comb and the lift-and-stretch style heads — are the attachments textured and coily hair actually asks for.
For the FlexStyle, Shark publishes a configurable set rather than a fixed one: you choose from auto-wrap curlers, an oval brush, a paddle brush, a concentrator and a diffuser. That means what arrives in your box depends on the configuration you buy, and it means the published list is not a promise about any single purchase. Check the configuration before you buy, because the auto-wrap barrels — the entire reason to choose this tool — are an option rather than a given.
What neither publishes is a heat or speed count. Both leave those rows blank, which is worth naming because it is the pair of figures that would let you check either tool against the temperature guidance for your hair. Dyson publishes three and three on the Airwrap; Shark publishes neither on either of these.
1.5 against 1.65 pounds
The FlexStyle is the lighter of the two by 0.15 lb, about two and a half ounces. Both are heavier than every dryer on this site that publishes a weight except the CHI irons and the Dyson Supersonic.
Two and a half ounces is not much, but the FlexStyle is held differently when it is styling: in the folded position you hold it mid-body with a barrel loaded, which is closer to holding a curling iron than a dryer. Over forty sections that changes how the weight feels in a way the number does not capture. If weight is your deciding row, neither of these is the answer in this registry — the published-weight ranking is at the lightest dryer question.
Neither clamps, and that is the shared argument
Both tools publish the same thing about their styling surface: there is no heated plate in contact with the hair. The FlexStyle sets shape with curved airflow; the SpeedStyle only ever blows air.
That matters because contact heat on the fiber is the mechanism behind most of what people call heat damage, and it is worse when the hair is wet: a curling iron applied to wet hair produced markedly more damage than the same treatment on dry hair Ruetsch and Kamath, Journal of Cosmetic Science. An airflow tool sidesteps that specific failure entirely. It does not make either tool heat-free — repeated thermal cycling still degrades the fiber Evans and Park, Journal of Cosmetic Science — but it is a real structural advantage over any iron, and it is shared equally here. It is not a reason to pick one of these two over the other. The tools that put the least heat on your hair ranks the whole registry.
Which one to buy
- Buy the SpeedStyle Pro if you dry and finish. More published watts, the longest named attachment list here, and the lower price. For anyone whose routine is dry-then-maybe-smooth, the FlexStyle is a worse dryer for more money.
- Buy the SpeedStyle Pro for textured and coily hair. The wide-tooth comb and the stretch-oriented heads are published in the box, and stretching is the job that matters most on that hair — see hair dryers for 4C and coily hair.
- Buy the FlexStyle if you want auto-wrap curls. That is the one capability in this pair that money cannot buy on the other tool. Confirm the barrels are in the configuration you order.
- Buy the FlexStyle if you want one tool, not two. It folds into a dryer, so it genuinely replaces a dryer plus a styler for someone with limited storage — dryers for small bathrooms.
- Neither, if you travel. Both publish 120 V only. The only dual-voltage air styler in this registry is the T3 Aire 360 — Airwrap vs T3 Aire 360 has that comparison.
- Neither, if you need a published temperature. Both leave heat and speed counts blank. The Calista EliteAir publishes an actual temperature for all six of its settings and tops out at 195°F.
Against the tool both of these are shopped against, the dupe question is at Dyson Airwrap vs Shark FlexStyle and Shark vs Dyson.
The tools on this page
Prices come from the live price layer. Where none is available the button says so rather than showing a number we cannot stand behind.

Shark SpeedStyle Pro hair dryer
The highest published wattage of the premium dryers here and the most attachments in the box, at a fraction of Dyson's asking price.

Shark FlexStyle air styling and drying system
Exactly the same published wattage as the Dyson Supersonic, in a tool that also converts to a dryer — the single strongest number in the dupe argument.

Dyson Airwrap multi-styler (Complete Long)
1,300 W is the lowest published wattage of any mains tool in this registry. That is the design argument, and it is also why it is slow on thick hair.
Questions people actually ask
What is the difference between the Shark FlexStyle and the SpeedStyle Pro?
The FlexStyle folds in the middle and takes auto-wrap curling barrels, so it dries and curls. The SpeedStyle Pro only dries. The SpeedStyle publishes more power — 1,750 W against 1,600 W — and more named attachments, and it costs less.
Which is more powerful, the Shark FlexStyle or the SpeedStyle Pro?
The SpeedStyle Pro, at a published 1,750 W peak against the FlexStyle's 1,600 W. The cheaper, less capable tool is the more powerful one, because the FlexStyle has to push air through narrow curling barrels rather than move as much of it as possible.
Can the Shark SpeedStyle Pro curl hair?
No. Shark publishes no auto-wrap or curling attachment for it. Its six published attachments are a turbo concentrator, a QuickSmooth brush, a DefrizzFast diffuser, a wide-tooth comb, a touch-up brush and a FrizzFighter finishing tool.
Is the Shark FlexStyle or SpeedStyle Pro dual voltage?
Neither. Shark publishes 120 V for both, so neither can be used abroad on a plug adapter. The only dual-voltage air styler in this registry is the T3 Aire 360.
Do the Shark FlexStyle attachments come in the box?
It depends on the configuration. Shark publishes a configurable attachment set for the FlexStyle rather than a fixed one, so the auto-wrap curling barrels — the only reason to choose it over the SpeedStyle — may be an option rather than an inclusion. Check before ordering.
Which Shark tool is better for thick hair?
The SpeedStyle Pro, on published specs. It draws 150 W more and has nothing narrow to push air through, so it dries faster on dense hair. The FlexStyle's airflow is calibrated for curling barrels, not for bulk drying.
Sources
- SharkNinja — Shark FlexStyle (HD400SN) product page
- SharkNinja — Shark SpeedStyle Pro (HD731) product page
- Ruetsch and Kamath - heated tools on wet versus dry hair
- Evans and Park - thermal cycling and mechanical properties
- U.S. Energy Information Administration — Electric Power Monthly, Table 5.3 (average residential price, June 2026)