Davis isn't mobile at all, he's 6'3, Adams is a rounded up 5'11. Pretty much the only similarity between Adams and Davis is skin colour and the position they play. Adams doesn't have much of an arm. Watch the NFL Network show on the QB's in his draft class. They run them through a bunch of accuracy drills and he's nowhere near the skill level of the QB's who were drafted, even guys like Cody Kessler and Connor Cook who have already fell out of the NFL.