If I was Sac, I would trade down and take Jimmer over Walker. Jimmer would be a better pairing with Evans. Since Jimmer is a 2 in a 1's body, and Tyreke is a 1 and a 2's, they would compliment each other on the defensive end. Plus, offensively they are highly compatible with Tyreke having the ability to get into the land and score or dish and Jimmer being able to hit a shot from anywhere.
Tyreke is a 2 that played as a 1 for half a season in college and was called a combo guard. The Kings called him a point guard, but he is and always has been a ball-dominant SG. If there's another SG on the court with him, that's just two SGs and no PGs on the court.
Jimmer + Tyreke = half the shots on the team.