there's probably some overlap with c-pds, wich is why I've stayed away from those
I like the Pred too much. True about the difference vs Firebirds; Preds like to go straight for 80-90% of the flight, Firebirds start their fade earlier but fade more gradually (and from what I've seen they start to fight against an any release much earlier). Blake's talked about this and I think it still holds (Firebird is later labeled type 1 and Pred type 2):
blake t wrote:As of now, there are two types of overstable discs, discs that begin to turn left very quickly out of the hand and will hold a sharp left curve throughout their flight (I will call these type I overstable) whereas some discs will fly straight for the first half of their flight and finish with a strong left fade (I will call these type II overstable). Type I overstable discs will generally be a bit more predictable and be more useful for very sharp left curves and trick shots. Type II overstable discs will generally be better suited for straight drives into a headwind or for longer hyzer shots that require a less pronounced curve. Some harder throwing players (~380'+ distance) have enough power to use type II overstable discs as stable drivers but most average players will have difficulty controlling these discs when trying to throw straight. Which type you prefer will be based upon your throwing style and many people carry both types.