The Prodigy Disc M1 is an extremely reliable midrange disc, designed to be over stable with incredible consistency and control. The M1 is good for all conditions and flies as well into the wind as it does with the wind.
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.