Cool mist vs. evaporative — which is better?

Across the reviewers we read, ultrasonic cool-mist units produce more visible mist and tend to be quieter, but they can leave white dust on furniture if you use tap water with high mineral content. Evaporative units (like the Levoit Superior 6000S) are tap-water compatible and won't over-humidify, but they require wick filter replacements every few months. Specialist-subreddit consensus leans evaporative for whole-house coverage and ultrasonic for single bedrooms.