Uwish and Dorma, these two models are very affordable. How are they different?

Both models are the same Auto CPAP machines, the price includes the mask, and both models come with a 3-year warranty. what is different

  1. Uwish made in Taiwan / Dorma made in USA
  2. Dorma in this price includes a humidifier (Humidifier) / Uwish must buy an additional humidifier if needed.
  3. Uwish has 3 levels of exhalation resistance reduction system / Dorma has 1 level

In addition, the main functions are similar, the machine noise is equally quiet.