Given the choice between Dak Prescott and Russell Wilson at any given point in each of their careers, I'd take Wilson every time. Over his first 3 years Wilson was more consistent than Dak was. He didn't have a sophmore slump where his efficiency cratered. He has better mechanics/fundamentals/ball placement than Prescott and is a better runner as well.
HOWEVER, people tend to exaggerate the magnitude of the differences between the two. For his first 3 seasons Wilson was in no sense a pure pocket passer either, he didn't put up high volume numbers week-in and week-out any more than Dak did, and he was really bad at taking pointless sacks too.
The most important difference is that Wilson played for historically great defenses early in his career instead of just decent ones, and played for a much better head coach.