The “Double Lotus Pose” where the feel of the bottom leg is pulled up so that it is “locked” into the top leg is present in all three of the statues but hand gestures are also significant. You will find similarities between some of the different statue poses. The Protection Buddha is carved seated with the Right Hand raised, palm outward, so as to offer protection or to ward off fear. The right hand facing down is a mudra of bestowing blessing on mankind. The third possibly making a circle with hands raised is the mudra for perfection.
The bowls held in Buddha’s lap may be alms bowls. Although there are no absolute rules when a statue is created, the most common representations of the Buddha have many similarities.