The Bradoon and Loose Ring allow for immediate release and relief from tongue and bar pressure. The bit is immediately reset to a neutral position in the horse's mouth.
The Waterford bit has many smooth flexible bobbles which spread the pressure making it a light mouthpiece. The greater flexibility discourages a horse from leaning on it, it also promotes mouthing and salivation.
The Waterford is usually worn 5mm - 10mm longer than your traditional mouthpiece in order to curl around the tongue and maximise the effect.