How do you think, is there difference between chewing gum and bubble gum? Well, actually there is one main difference between them and that is the base of the gum. Chewing gum is based on a natural gum called chicle, harvested from the sap of a tropical tree called a Sopapilla. It is chewy, but it can't be blown to form a large bubble. Bubble gum base is formulated to blow big bubbles, so it is a mixture of starches and polymers made in a laboratory. VSCO Girl pink cursor with Blue Bubble Gum.