Both are good aircraft, for different purposes.

The Super Sportster is a sport-aerobatic with a sort of scale appearance.

The Ultra Sport is an introductory level Pattern style aerobatic model.

The Super Sportster is better for general boring holes in the sky and can do most stuff at the local club Fun-Flys. The Ultra Sport has problems with some of the slower speed maneuvering commonly needed for Fun Fly competition, but it will fly smoother for large round loops and will penetrate wind better.