Is a high-RPM brushless motor better than a traditional AC motor?

High-RPM brushless dryers (Dyson, Shark SpeedStyle, and various challengers) move more air at lower temperatures, which expert reviewers say reduces heat damage and shortens drying time. Traditional AC motor dryers like the Bio Ionic 10X still have devoted fans among working stylists for raw heat and longevity. The brushless category is lighter and quieter; the AC category tends to be cheaper to repair.