Ricks not at governor level yet but he's slowly heading there. The show even makes the comparison directly with the scene where Tara is noticing the similarities. Anyway I'm not looking to change your mind, just giving my opinion. I get that he has justifications and reasons but I still feel he goes too far at times and the writers are trying to say that.
My brother and I were just talking about the scene with Tara, which is an awesome contemplative addition to Rick's war plan. However, she's referring to the governor's direction to do something with little to no insight or explanation for what's going on (doing the "right" thing). I don't think it was a reference to something like "he just cut a guys head off with a sword" type of insanity the governor had.
There are still very clear distinctions between Rick and the Governor in their actions; even if Rick is becoming more cold, he's not a psycho killer.