You’re right, it’s a small difference. Rorschach couldn’t admit that there was a point, there was a path to harmony. Like oz he’d put his plan into working before too.

He couldn’t admit to oz being right, because he morally was disagreeing with the method. But in fact he disagreed because it made himself unviable. He counts in humanity to find conflict to disturb peace.

So ultimately Rorschach is right.