Mozgov is having a better series than Bogut, but I disagree.
Bogut is a better shot blocker and a slightly better rim protector. Bogut can command and anchor a defense better than Mozgoc, as evident with the Warriors and his Milwaukee days. Also, Bogut can score, have we forgotten that he has averaged a double double in Milwaukee when he was a legitimate scoring option, while leading that team to a top 10 defense in the league? He's miles ahead more skilled than Mozgov, with better vision and better ball handling (not that he dribbles the ball a lot),.he's a better post player too (not that he posts a ton anymore, but when you give Bogut the ball down low, he's got a variety of moves and can use either hand).
Mozgov hasn't been good until he got to team with LeBron, who makes everybody good.