Victims will almost always be able to admit their own faults. They will know they reacted badly and did wrong. This quality is actually what is used against them in the first place to make them believe they are the ones in the wrong. Part of healing from abuse is learning to point out which of the abusers behaviors are, in fact abuse, while still acknowledging what you, yourself handled badly.
Abusers will almost never admit they have ever done anything wrong at all. Their victims will be blamed for everything. They will hold every tiny thing against the victim, even things they could not possibly control, or they have never tried to talk to them about. They use social bigotries against the victim, and in their own defence. (Especially mental illness is used in this way - they believe their own illness excuses them from every wrongdoing, and their victims illness is proof they are in the wrong).