They are very different. But Longo also says that each has more of what the other has than many may think. Criswell clearly could become a top level running QB, who could have mastered, say, a Rich Rodriguez offense. He has RB explosiveness from the thighs and an innate knowledge of how to cut as a runner. But he also has a crisp and accurate pass. Maye has the potential to become a high draft choice QB, but he is much more mobile than many assume - which should not shock us if we know the family athleticism.
We have a deep RB room able to get the ground yards we need. We need a QB ready to air it out because Downs is the team's super playmaker, and Greene could be looking as good as Downs even by the end of this coming season.