DGA distance drivers are all slightly understable. The DGA offers four different molds including Rogue, Hurricane, Sail, and Torrent. Available in SP, Proline, RDGA, and D-Line plastic.
Not all disc manufacturers use a standard for the flight ratings. This makes it hard to compare apples to apples. There's no perfect science here. Though some are working on a standard. I've taken Innova and DGA flight numbers right from their respective websites. For Discraft and MVP, I made created a hybrid between from several resources.