Hand Touch Events work by adding this component to the root of any rigidbody and these events will get called when the hand(s) begin/end collision touching an object

HandTouchEvents.PNG

Hand Trigger Area Events work by adding this component to the root of any rigidbody and these events will get called when the hand(s) begin/end entering an objects trigger area, but this will also track grab and squeeze events while the hand is inside the trigger area

HandTriggerAreaEvents.PNG