D2 is a very fast, over stable driver that is designed for strong throwers. Just slightly less stable than D1 this driver is good in all conditions and flies just as well into the wind as it does with the wind. It is an extremely reliable driver with the least amount of side-to-side movement of any driver on the market. It is equally as long, twice as forgiving and has a much gentler finish.
The400Gseries is the regular 400 plastic with a shot of adrenaline. It is the base 400 plastic mixed with another resin that give the plastic a slightly different feel than the base 400 series. The additive also makes the disc more durable and requires more time to break it in.