Are real-fan (mechanical) white noise machines better than electronic ones?

Many specialist communities and verified-purchase reviewers prefer real-fan machines like the Yogasleep Dohm and SNOOZ because the sound is non-looping and blends into the background. Reviewers who dislike fan units tend to find them too high-pitched or too loud even at the lowest setting, so it comes down to whether you prefer a steady 'rushing air' tone or want multiple selectable sounds. Electronic machines win on variety, portability, and price.