Originally Posted by M2
This really isn't an opinion on my part. The folks at BA will tell you flat out that hitters are less volatile. The number crunchers have done reviews of top prospect lists and the hitters generally turn out to be the safer bets.
Pitchers are no doubt more volatile, but I think you're taking it one step too far in assuming that means hitters can be projected easier. Hitters are naturally less volatile because they generally can't see their skills evaporate overnight like a pitcher can.