Ok this is sad for you but.. the rookie is soooo much better. The acting is better the storylines of the episodes are better and holy moly the action is awesome. I grew up in a law family (my dad was a SWAT and my mom is a lawyer) so I just find this soooooooooo f**king cool. It's got more episodes and better back stories for characters. The comedy's actually good and it's much more engaging.
Also there's more episodes and the story can range from emotional separation of a drugged wife from her husband to "if you hug me I'll tase you" in the span of an episode it's so well written