High-speed hair dryers: are the Dyson alternatives worth it?

My ten-year-old dryer died. Dyson is 400 euros. The "high-speed" ones from Laifen, Shark, Zuvi and the Chinese brands are 60 to 150. Is the technology real, and what should I actually look at?

The technology is real. The new ones use a small brushless motor spinning at 100,000+ rpm, which moves a lot of air, so they dry with airflow instead of heat. Faster drying and less heat damage is a genuine win, and after twelve years behind the chair I can see the difference in clients' hair.

What to look at, in order:

1. Heat control with a proper low setting. The whole point is drying at lower temperatures. If the "cool" setting is lukewarm, it is a normal dryer with a small motor.
2. Nozzles: a concentrator for smooth blow-outs and a diffuser if you have curls. Check they are included and that they attach magnetically; the screw-on ones are a pain.
3. Weight and balance. Under 400 grams is the joy of these things. Hold it above your head in the shop.
4. Noise pitch. They are not quieter, they are higher pitched. Some whine badly; watch a video with sound.
5. A filter you can clean without tools. Clogged filters kill motors.

Wattage differences of a couple of hundred watts mean nothing here; airflow and temperature control do. The 80 to 150 euro brushless dryers do roughly 80% of what the Dyson does. What you pay extra for is the attachments, the sensors that hold temperature steady, and the brand. Ignore "ionic" claims as a deciding factor; every dryer says it.

Scalp note from the skin side: whichever one you buy, keep it moving and about 15 cm away. The high-speed ones can burn a patch of scalp surprisingly fast if you park them on one spot.