Hyugua never replaced Hayate as the team's second-in-command.
Mike temporarily replaced Kai Chen as the team's second-in-command.
Hyuuga was forced to betray his team and fought his brother before retreating.
Mike was never forced to betray his team nor did he ever have to fight his brother.
Hyuuga sacrificed his Earth Powers (the powers he was born with), but later regained them in the series finale. Sacrificed his Black Knight Powers to help defeat Zangyack, but regained them in the finale episode of Gokaiger.