The 1303 suspension is better, basically the same design as the Golf and Porsche 944 with the negative roll radius. You will need the 1303 components to fit the 944 brakes.

The Super's suspension was changed 3 times... getting better each time:

71 - 73.5, very simular to the Type IV (the car) design

73.5 - 74, changed struts, control arms, and sway bar to achive negative roll radius

75 - 79, added rack & pinion steering