At first glance, many vibrators seem to do exactly the same thing. They vibrate, have various modes and similar shapes. The price difference might seem exaggerated. But some differences become very clear in use.
The main difference is usually in the quality of the vibration. Cheaper vibrators tend to use more superficial, more aggressive, and less stable vibrations. Better-built vibrators usually have deeper, more controlled, and less tiring vibration on the body.
The material also changes significantly. Higher quality silicone is softer, more comfortable, and less plasticky to the touch. It makes a difference in flexibility, fit, and even how vibration is absorbed.
Noise is another common difference. Many cheap models vibrate the entire body of the object more than the area intended for stimulation. This creates more sound, more dispersed vibration, and less precision.
Internal construction also matters. More stable motors, better vibration distribution, and more consistent charging make the experience more comfortable and predictable over time. Some cheap vibrators seem strong in the first few minutes and quickly start to lose intensity or stability.
More expensive does not automatically mean better. There are expensive models that are overly technological, full of useless functions and uncomfortable shapes. In many cases, the excess of modes and applications serves more for marketing than to improve the experience.
In practice, what usually justifies the price difference is vibration quality, material comfort, intensity control, quietness, and more solid construction. Not necessarily more power.