Discmania says this about the DD1: The DD1 is said to be the younger brother of the DD3 and Cloudbreaker. It is a little slower and a little more understable allowing it to be usable by all skill levels.
Flight Metrics
Speed
The velocity required to reach a disc's optimal flight path. Range: 1 to 15.
Glide
The measure of lift generated by a disc to stay aloft. Range: 1 to 7.
Turn
The velocity, relative to the speed of the disc, required to cause the disc to turn with the direction of spin. Range: +1 to -5.
Fade
The low-velocity stability that causes a disc to hook at the end of its flight. Range: 0 to 5.