The difference between a driven pile foundation and bored pier foundation lies in the method of construction. 

Bored pier foundations are typically poured in place and transfer the load only through bearing, while driven piles are driven straight in and transfer the load through friction and/or bearing. 

Generally, bored pier foundations are shallower in depth than the driven pile foundation. 

Bored pier foundations are preferred in a location where the top strata consist of decomposed rock overlying a strata of sound rock. In such a condition, it becomes difficult to drive the bearing piles through decomposed rock. In the case of stiff clays, which offer large resistance to the driving of a bearing pile, bored pier foundation can be conveniently constructed.