strength has much more to do with other factors than muscle size. I have seen skinny guys outlift big guys because of CNS superiority, muscle tendon attacment makes a difference. ligament attachment makes a difference. Bone length makes a difference-the farther away a weight is from a fulcrum or rotating joint the heavier the weight is. so yes it is possible to be big without being super strong. muscle growth is dependent on quality contraction not merely moving a weight from point A to point B.