Here is a side by side comparison of the Giganta and the Large Attack Pad. As you can see the Giganta is bigger around. Both unit have notches at the base for your wrist and the surface of both pads is made of a very hard plastic with a micro-beveled edge that's pretty hard to bend. The mousing surface itself is not as smooth as the edge of the pad. As a matter of fact it's pretty rough. This helps improve the traction and prevents the mouse from slipping.