The Full Cheek cheek piece, will have the same effect as the traditional Eggbutt in so much as, it will prevent pinching on the sides of the mouth. However the extended pins above and below the bit, firstly prevent the bit being pulled through the mouth and secondly have the effect of guiding the horses head which is great for schooling and training purposes.
The Taylor Chain bit is has an action between a Waterford and a Snaffle.
The Short length of twisted chain allows it to take the shape of the tongue and as a result distributing the pressure across the tongue like a Waterford.
The ends the mouth piece act more like a snaffle exerting pressure on the bars.