How can anyone actually answer that question? Rubio and Evans are two completely different players, with different strengths and weaknesses, athletic ability, size, speed, etc. They will inpact their respective teams in completely different ways.
Surround Rubio with shooters and bigs that can run the pick and roll, and he will rack up tons of assists while making everyone around him better.
Evans playmaking ability remains to be seen on the nba level, but he could end up being a taller Deron Williams who can get his shot off when needed, muscle smaller guards, and be a real threat to score at the end of games.
To me its like comparing Nash to Billups. Completely different players but both are extremely effective in the right setting.