D1 is a very fast, over stable driver designed for power throwers. This driver is good for all conditions and flies as well into the wind as it does with the wind. The consistent flight path of this disc makes it a favorite of disc golfers looking not only for a long flight but pinpoint accuracy. The flight path is similar regardless of the weight.
The 400G series 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.